2 and 3
The factors of 18 are 1, 2, 3, 6, 9, 18. For them to be common, they need to be compared to another set of fators.
The answer depends on what is meant by "fators".
The factors of 18 are 1, 2, 3, 6, 9, 18 because those are the only integers that divide evenly into 18 with no remainder.
Factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18 and 36.
1 2 3 5 6 9 10 15 18 30 45 90.
1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90.
NO
I
n
1,2,4,8,24
1,2,4,7,8,14,28