What are the commmon factor of 72?

Answer 1

First of all, you're not clear on the meaning of "common factors",

and you need to brush up on the whole concept.

The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72.

Answer 2

You need at least two numbers to find something in common.

Answer 3

The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72. For them to be common, they need to be compared to another set of factors.