Least Common Multiple (LCM) of 640 and 810

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To get the Least Common Multiple (LCM) of 640 and 810 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:

640:   2222222    5
810:   2      33335
LCM:   222222233335

The Least Common Multiple (LCM) is:   2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 5 = 51840

 

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