Least Common Multiple (LCM) of 420 and 320

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To get the Least Common Multiple (LCM) of 420 and 320 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:

420:   22    357
320:   222222 5 
LCM:   222222357

The Least Common Multiple (LCM) is:   2 x 2 x 2 x 2 x 2 x 2 x 3 x 5 x 7 = 6720

 

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