Printable Factors of a Number Worksheets

Factors of a number worksheets teach 4th grade students to find all whole-number factor pairs that multiply to give a target product. These printable rainbow factor sheets feature complete answer keys.

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Structured, printable skill sheets with step-by-step guidance for Factors of a Number.

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About Factors of a Number

What this skill is

Factors are whole numbers that multiply together to produce another number. Finding all factor pairs of a number within 100 provides the basis for fraction simplification and prime analysis.

When children learn it

Finding all factor pairs for a whole number in the range 1-100 is a designated 4th grade standard (CCSS 4.OA.B.4).

Teaching Tips

  • Draw a "Factor Rainbow": start at 1 and test numbers sequentially: 1 x 24, 2 x 12, 3 x 8, 4 x 6. Does 5 work? No. Then you meet 6, which is already listed! You know you have found all factors without missing any.

Common Mistakes

  • Skipping middle factors, such as listing 1 and 24, 2 and 12, but missing 3 and 8 or 4 and 6.
  • Confusing factors (numbers that divide into a target) with multiples (numbers that skip count from a target).
  • Stopping after finding only the first factor pair.