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Free worksheets for prime factorization / find factors of a number

Create an unlimited supply of free worksheets for prime factorization or for finding all the factors of the given numbers. The worksheets are available in both html and PDF formats (both are easy to print), and they come with an answer key on the second page of the file.

Each worksheet is randomly generated and thus unique. You can customize the worksheets by choosing the difficulty level, limits for the numbers to be factored, font size, spacing, border, and the number of problems.

The answer key will list the factorization using exponential notation: each prime factor is raised to the appropriate power.

Example worksheets


Find all the factors of the given number between 4 and 50

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Find all the factors of the given number between 4 and 100

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Prime factorization: numbers within 4-100

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Prime factorization: numbers within 4-500

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Note: The largest number to be factored allowed is 10,000, because I don't want people to try such enormous factoring feats that it would crash the server. Just to be safe.

Factoring Worksheet Generator

Columns: Rows:
(These determine the number of problems)

List all the factors of the given number; range from to
Easy factoring: numbers within 4-100
Medium factoring: numbers within 4-200
Custom factoring: numbers from to

Extra vertical space below the problems:  lines

Font:   Font Size:

Cell Padding:     Border:     Bordercolor:

Title & additional instructions for the student (optional; HTML allowed)


       
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