Least Common Multiple (LCM) of 15 and 81

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To get the Least Common Multiple (LCM) of 15 and 81 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:

15:   3   5
81:   3333 
LCM:   33335

The Least Common Multiple (LCM) is:   3 x 3 x 3 x 3 x 5 = 405

 

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