Least Common Multiple (LCM) of 390 and 42

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To get the Least Common Multiple (LCM) of 390 and 42 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:

390:   235 13
42:   23 7 
LCM:   235713

The Least Common Multiple (LCM) is:   2 x 3 x 5 x 7 x 13 = 2730

 

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