17
51 = 1 x 3 x 17; 221 = 1 x 13 x 17. GCF is 1 x 17 = 17.
LCM(51, 221) = 663.
least common multiple of 51 and 221 is 663.
GCF of 442 and 1547: 221
The GCF is 3.
The GCF is 17.
The GCF is 3.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 3.
The GCF of 42 and 51 is 3.