2 and 3
The factors of 63 are: 1, 3, 7, 9, 21, 63.
1, 2, 3 and 6
The factors of 12 are 1,2,3,4,6,12.
The common factors of 12 and 18 are 1, 2, 3 and 6 To find the common factors, first list the factors of each number in the set. The factors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 18 are 1, 2, 3, 6, 9, and 18. Next, note which factors are in both lists. In this case, the factors common to each list are 1, 2, 3, and 6. Thus, these are the common factor.
1 and 3
Out of the list of factors of 36, 2 and 3 are the only prime numbers.
I really don't know
The factors of 6 are: 1, 2, 3, 6.
The factors of 867 are 1 3 17 51 289 867, and the prime factors are 3 and 172.
Because on the list of factors of 24, 2 and 3 are the only prime numbers.
That's an infinite list.
2 and 3
The factors of 63 are: 1, 3, 7, 9, 21, 63.
The factors for 6 are: 1,2,3,and 6
1, 3, 11, 33
3 and 5