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Grade 5 · Math · Number sense

5th Grade Factors of a Number worksheets

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Factors of a Number

Grade 5 Math Worksheet

NameDate

List all the factors of each number, smallest first.

  1. 5

  2. 93

  3. 81

  4. 73

  5. 89

  6. 99

  7. 88

  8. 16

  9. 22

  10. 42

  11. 21

  12. 82

  13. 77

  14. 87

  15. 6

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5th Grade Factors of a Number worksheet 1 – printable PDF
Download PDF: 123456

About this worksheet

A factor of a number divides it exactly, with nothing left over: 1, 2, 3, 6, 9 and 18 are the factors of 18. Listing all the factors of a number is the first step toward simplifying fractions and finding common denominators. On this fifth grade sheet a child sees sixteen numbers, one at a time, and writes every factor of each in order from the smallest.

Each version has different numbers, some with two factors and some with many, and the answer key lists them all.

What your child will learn

  • Tell if a number is a factor
  • List factors in pairs
  • Use division facts
  • Spot numbers with only two factors

Common Core standard: 4.OA.B.4

Worked example

The factors of 18 are 1, 2, 3, 6, 9 and 18, because 1 × 18, 2 × 9 and 3 × 6 all make 18.

Common mistake

Stopping early and forgetting the pairs, or leaving out 1 and the number itself.

Helpful hint

Start with 1 and the number. Then try 2, 3, 4 and so on. Each factor you find has a partner.

Next skill: Add Fractions With Unlike DenominatorsEarlier: Multiply Multi-Digit Whole Numbers

Questions parents ask

What is the most common mistake with factors of a number?

Stopping early and forgetting the pairs, or leaving out 1 and the number itself.

How can I help my child with factors of a number?

Start with 1 and the number. Then try 2, 3, 4 and so on. Each factor you find has a partner.

Are these 5th grade math worksheets free to print?

Yes. All 6 printable versions on this page are free to download and print, with no account needed.

Similar: Whole-Number Place Value · Round to the Nearest Hundred

More 5th grade number sense

See all number sense

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