The greatest common factor of the numbers '420' and '2646' is '42'.
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Greatest common factor of 420 and 504 is 84.
2
The GCF is 140.
The least common multiple of 15 , 20 , 35 = 420
20=22 x544=22 x11The greatest common factor is 22 =420 = 4 x 5, 44 = 4 x 11 so HCF is 4