Least Common Multiple (LCM) of 21 and 686

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To get the Least Common Multiple (LCM) of 21 and 686 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:

21:    37  
686:   2 777
LCM:   23777

The Least Common Multiple (LCM) is:   2 x 3 x 7 x 7 x 7 = 2058

 

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