Anything that isn't 1, 3, 7, 9, 21, 63
Yes, 21 is a factor of 63. 63 = 3x21
No; 3 is a factor of 63.
No, 9 is a factor of 63.
63 has a square factor, but no equal ones.
63 is.
Yes, 7 is a factor of 63. The factors of 63 are 1, 3, 7, 9, 21, and 63.
The greatest common factor is 63
No, 6 is not a factor of 63 because it does not go in evenly.
9 is a square number and is a factor of 63
No, 63 is not prime.
The only common factor of 31 and 63 is 1.
No. 168 is not a factor of 63. Factors of a number are smaller than the number.