1, 2, 3, 5, 6, 10, 15, 30.
All the factors of 30.
The common factors of 30 and 40 are 1, 2, 5, 10
The common factors of 30 and 63 are 1 and 3.
The common factors of 30 and 21 are 1 and 3.
The common factors of 30 and 32 are: 1 and 2
The common factors of 30 and 74 are: 1 and 2.
The common factors of 25 and 30 are 1 and 5.
If that's 2, 3 and 5, the answer is 30. The factors of 30 are 1, 2, 3, 5, 6, 10, 15 and 30. For them to be common, they need to be compared to another set of factors.
23 and 30 share no common factors aside from 1.
Common factors of 30 and 16 are: 1 and 2.
Common factors of 27 and 30 are: 1 and 3.
Common factors of 18 and 30 are: 1, 2, 3, and 6.