The GCF is 21.
The GCF is 21.
LCM(63, 42, 21) = 126
The LCM is: 126
The LCM of 42 and 63 is 126
126
The LCM is: 126
126
The GCF is 21.
The GCF is 21.
The Highest Common Factor is 126
It is 1 but the HCF is 21
1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, -1, -2, -3, -6, -7, -9, -14, -18, -21, -42, -63, -126