Least Common Multiple Calculator. Shows all work with prime factor tree method.

Least Common Multiple Calculator

Type up to 15 numbers in the text boxes below then hit 'calculate'.

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Work (Prime Factor Method)

The work below shows how you can use a prime factor tree to calculate the LCM of your numbers.



Scroll down to see the a multiplication table for this work.
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Work (Multiplication Table)

You can also get the Least Common Multiple by 'brute force.' In this case, your work is just multiplication over and over again until you find the first 'common' multiple

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