The GCF is 7.
Chat with our AI personalities
The Greatest Common Factor of 21, 63, 84: 21
The greatest common factor of 63, 84, and 105 is 21.
The greatest common factor of 630 , 84 = 42
What is the Greatest common factor of 21 and 84
Since 21 is a factor of 84, it is automatically the GCF. Since 84 is a multiple of 21, it is automatically the LCM.