Least Common Multiple (LCM) of 620 and 420

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To get the Least Common Multiple (LCM) of 620 and 420 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:

620:   22 5 31
420:   22357 
LCM:   2235731

The Least Common Multiple (LCM) is:   2 x 2 x 3 x 5 x 7 x 31 = 13020

 

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