factoring
21=3*7
49=7*7
84=2*2*3*7
LCM=2*2*3*7*7=588
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The Least Common Multiple (LCM) for 21 48 49 is 2,352.
The Least Common Multiple (LCM) for 25 49 is 1,225.
The Least Common Multiple (LCM) for 4 14 49 is 196.
There is no greatest common multiple since numbers keep going on forever. The greatest common factor is 7. The least common multiple is 147
735