The greatest common factor of 21 and 56 is 7.
The greatest common factor (GCF) is 7.
The Greatest Common Factor (GCF) is: 7
The greatest, (Highest) Common Factor of 21 and 56 is 7
The greatest common factor of the numbers 56 and 21 is 7.
The Greatest Common Factor (GCF) is: 7
The GCF of 21, 49, and 56 is 7
The GCF of 21, 56, and 70 is 7.
The GCF is 7.
The HCF is: 7
The GCF is 7.
7