Just 1
Three (3) is a common factor of 21 and 22.
The GCF of 21, 22, and 306 is 1.
triplets from a dizygotic pregnancy
The GCF is 1.
The GCF of consecutive integers is 1.
The GCF of 21 and 22, like the GCF of any two consecutive integers, is 1.
The only positive integer common factor between the two numbers is 1. Therefore, the Greatest Common factor is 1.
The GCF of 21, 45, and 48 is: 3
The greatest factor of 21 and 16 is 21, which is a factor of 21 but not of 16.
The greatest common factor of the numbers 22 and 66 is 22.
The greatest common factor of 21 and 77 is 7.
The common factor of 3 and 21 is 3. *