What are the common factors of 8 and 12

Well with only positive integers, what pairs of positive integers multiply to get 8, and what pairs of positive integers multiply to get 12. Then check which positive integers are similar between them. Hope you get the answer! (if not I'll be here most likely.)

Fctors of 8 

1  2   4   8 

factors of 12 

1  2   3   4   6   12                 Common factors are   1   2   and   4