What are the common factors of 21 and 133?

Answer 1

The common factors of 21 and 133 are the numbers that can evenly divide both 21 and 133 without leaving a remainder. The factors of 21 are 1, 3, 7, and 21, while the factors of 133 are 1, 7, 19, and 133. Therefore, the only common factor of 21 and 133 is 1.

Answer 2

Well, honey, the common factors of 21 and 133 are 1 and 7. That's it. No need to overcomplicate things. Just a couple of numbers that can divide both of them without any drama.

Answer 3

1 and 7.