Factor

one of two or more quantities that produce a given quantity when multiplied together. For example, the factors of the number 8 are 1, 2, 4, 8.

Taken from Dictionary of Science

_____________________________________________________________

Factors are the numbers you multiply together to get another number:

Example: 3 and 4 are factors of 12, because 3x4=12.

Also 2x6=12 so 2 and 6 are also factors of 12, and 1x12=12 so 1 and 12 are factors of 12 as well.

So ALL the possible factors of 12 are 1,2,3,4,6 and 12.

Taken from Math Is Fun?