6 factors into [2 3]
21 factors into [3 7]
Common factor is [3]◄
Chat with our AI personalities
The least common factor is: 1
As 4 & 21 have no factors in common, gcf=1
The greatest common factor in 3
The greatest common factor of 18 and 21 is 3.
The Greatest Common Factor of 14 and 21 is 7.