# Write the Prime Factors of a Number: Worksheets, Online Test and Calculators

Write the prime factors of a number worksheets, solved worksheet problems or exercises with step-by-step work, formative assessment as online test, calculator and more learning resources to learn, practice, assess and master the basic math skills of divisors and factors.

## Write the Prime Factors of a Number

Name
Date

1
What are the prime factors of 42?
2
What are the prime factors of 45?
3
What are the prime factors of 36?
4
What are the prime factors of 56?
5
What are the prime factors of 60?
6
What are the prime factors of 100?
7
What are the prime factors of 44?
8
What are the prime factors of 12?
9
What are the prime factors of 165?
10
What are the prime factors of 101?
11
What are the prime factors of 1009?
12
What are the prime factors of 120?
13
What are the prime factors of 140?
14
What are the prime factors of 18?
15
What are the prime factors of 16?
16
What are the prime factors of 1729?
17
What are the prime factors of 20?
18
What are the prime factors of 24?
19
What are the prime factors of 210?
20
What are the prime factors of 28?

Solved Worksheet Problems
1
What are the prime factors of 42?
2 x 3 x 7
Prime factor of 42
 2 42 3 21 7 7 1
2, 3 & 7 are the prime factors of 42
42 = 2 x 3 x 7
2
What are the prime factors of 45?
3 x 3 x 5
Prime factor of 45
 3 45 3 15 5 5 1
3, 3 & 5 are the prime factors of 45
45 = 3 x 3 x 5
3
What are the prime factors of 36?
2 x 2 x 3 x 3
Prime factor of 36
 2 36 2 18 3 9 3 3 1
2, 2, 3 & 3 are the prime factors of 36
36 = 2 x 2 x 3 x 3
4
What are the prime factors of 56?
2 x 2 x 2 x 7
Prime factor of 56
 2 56 2 28 2 14 7 7 1
2, 2, 2 & 7 are the prime factors of 56
56 = 2 x 2 x 2 x 7
5
What are the prime factors of 60?
2 x 2 x 3 x 5
Prime factor of 60
 2 60 2 30 3 15 5 5 1
2, 2, 3 & 5 are the prime factors of 60
60 = 2 x 2 x 3 x 5
6
What are the prime factors of 100?
2 x 2 x 5 x 5
Prime factor of 100
 2 100 2 50 5 25 5 5 1
2, 2, 5 & 5 are the prime factors of 100
100 = 2 x 2 x 5 x 5
7
What are the prime factors of 44?
2 x 2 x 11
Prime factor of 44
 2 44 2 22 11 11 1
2, 2 & 11 are the prime factors of 44
44 = 2 x 2 x 11
8
What are the prime factors of 12?
2 x 2 x 3
Prime factor of 12
 2 12 2 6 3 3 1
2, 2 & 3 are the prime factors of 12
12 = 2 x 2 x 3
9
What are the prime factors of 165?
3 x 5 x 11
Prime factor of 165
 3 165 5 55 11 11 1
3, 5 & 11 are the prime factors of 165
165 = 3 x 5 x 11
10
What are the prime factors of 101?
101
Prime factor of 101
 101 101 1
& 101 are the prime factors of 101
101 = 101
11
What are the prime factors of 1009?
1009
Prime factor of 1009
 1009 1009 1
& 1009 are the prime factors of 1009
1009 = 1009
12
What are the prime factors of 120?
2 x 2 x 2 x 3 x 5
Prime factor of 120
 2 120 2 60 2 30 3 15 5 5 1
2, 2, 2, 3 & 5 are the prime factors of 120
120 = 2 x 2 x 2 x 3 x 5
13
What are the prime factors of 140?
2 x 2 x 5 x 7
Prime factor of 140
 2 140 2 70 5 35 7 7 1
2, 2, 5 & 7 are the prime factors of 140
140 = 2 x 2 x 5 x 7
14
What are the prime factors of 18?
2 x 3 x 3
Prime factor of 18
 2 18 3 9 3 3 1
2, 3 & 3 are the prime factors of 18
18 = 2 x 3 x 3
15
What are the prime factors of 16?
2 x 2 x 2 x 2
Prime factor of 16
 2 16 2 8 2 4 2 2 1
2, 2, 2 & 2 are the prime factors of 16
16 = 2 x 2 x 2 x 2
16
What are the prime factors of 1729?
7 x 13 x 19
Prime factor of 1729
 7 1729 13 247 19 19 1
7, 13 & 19 are the prime factors of 1729
1729 = 7 x 13 x 19
17
What are the prime factors of 20?
2 x 2 x 5
Prime factor of 20
 2 20 2 10 5 5 1
2, 2 & 5 are the prime factors of 20
20 = 2 x 2 x 5
18
What are the prime factors of 24?
2 x 2 x 2 x 3
Prime factor of 24
 2 24 2 12 2 6 3 3 1
2, 2, 2 & 3 are the prime factors of 24
24 = 2 x 2 x 2 x 3
19
What are the prime factors of 210?
2 x 3 x 5 x 7
Prime factor of 210
 2 210 3 105 5 35 7 7 1
2, 3, 5 & 7 are the prime factors of 210
210 = 2 x 3 x 5 x 7
20
What are the prime factors of 28?
2 x 2 x 7
Prime factor of 28
 2 28 2 14 7 7 1
2, 2 & 7 are the prime factors of 28
28 = 2 x 2 x 7

## Worksheet: Write the Prime Factors of a Number

Write the prime factors of a number worksheet is the largest collection of practice problems and solved exercises which can be served as homework, classwork or assignment problems for the students to learn, practice, assess, iterate and master the skills of how to solve such divisors and factors problems in basic mathematics.

Online Test
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What are the prime factors of 10?
What are the prime factors of 25?
What are the prime factors of 11?
What are the prime factors of 20?
What are the prime factors of 6?
What are the prime factors of 29?
What are the prime factors of 7?
What are the prime factors of 22?
What are the prime factors of 3?
What are the prime factors of 16?

## Online Test: Write the Prime Factors of a Number

This online test to find the write the prime factors of a number is a formative assessment which can be used as homework, classwork or assignment problems to assess and improve the learner's math skills on divisors and factors.