A factor is a number that divides into another evenly. The factors of 12 are 1, 2, 3, 4, 6, and 12, and they always come in pairs that multiply to the original number.
Math Dictionary / Factor
Factor
A factor is a number or expression that divides another number or expression evenly.
Number SystemGrade 4Grade 5Grade 6Grade 7GED
What it means
Factors multiply together to make a product.
Also called: divisor
Examples
| 3 is a factor of 12 |
| 4 x 5 has factors 4 and 5 |
| x is a factor of 3x |
Common mistake
A factor divides evenly; it does not leave a remainder.
Try one
Question: Is 6 a factor of 24?
Show answer
Yes, because 24 / 6 = 4.