Which number is a factor of 6

- Which number is a factor of 64
- Which number is a factor of 60
- Which number is a factor of 63
- Which number is a factor of 65
- Which number is a factor of 62
- Which number is a factor of 69
- Which number is a factor of 68
- Which number is a factor of 66
- Which number is a factor of 67
- Which number is a factor of 61
- Which number is a prime factor of 60
- Which number is a factor of the prime factorization 60
- Which number is a factor of 54 and a multiple of 6
- Which number is a factor of 90 and a multiple of 6
- Which number is not a factor of 66