Factors & number theory worksheets

Factors, multiples, primes and integers. Pick a topic below for ready-made printable PDFs with answer keys.

Free printable factors worksheets, listing factors.

Free printable gcf & lcm worksheets, greatest common factor and lowest common multiple.

Free printable prime & composite worksheets, prime and composite numbers.

Free printable square numbers worksheets, square numbers and squaring.

Free printable integers worksheets, adding, subtracting and multiplying integers.

Looking for a specific grade? Browse the full library by grade, or generate a worksheet on any of these topics.