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 28 and 20 is 4.
The Greatest Common Factor of 28, 48 is 4.
The greatest common factor of 48 and 28 is 4.
The greatest common factor of 7 and 28 is 7.
The greatest common factor of 28 and 120 is 4.
The greatest common factor of 28 and 250 is 2.
Since 14 is a factor of 28, all of its factors are common.
The greatest common factor of 154 , 28 = 14