It can be. 28 is a common factor of 56 and 84.
4 is a factor of 28. 4 is a common factor of 28 and 32.
The greatest common factor is 28.
There is no common factor
The greatest common factor of 16 and 28 is 4
The greatest common factor of 48 and 28 is 4.
The greatest common factor of 28 and 20 is 4.
The Greatest Common Factor of 28, 48 is 4.
4 is the highest common factor of 28 and 32
The greatest common factor of 7 and 28 is 7.
The greatest common factor of 28 and 250 is 2.
The greatest common factor of 28 and 120 is 4.
The least common factor of 8 and 28 is 2.