21 and 80's highest common factor is one.
Chat with our AI personalities
You are 12-20. The only common factor of 11 and 21 is 1.
The greatest common factor of 21 and 77 is 7.
The GCF is 7.
The Greatest Common Factor of 21, 63, 84: 21
The Greatest Common Factor of 21, 9 is 3.