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Calculate the Least Common Multiple or LCM of 642

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The instructions to find the LCM of 642 are the next:

1. Decompose all numbers into prime factors

6422
3213
107107
1

2. Write all numbers as the product of its prime factors

Prime factors of 642=2 . 3 . 107

3. Choose the common and uncommon prime factors with the greatest exponent

Common prime factors: 2 , 3 , 107

Common prime factors with the greatest exponent: 21, 31, 1071

Uncommon prime factors: None

Uncommon prime factors with the greatest exponent: None

4. Calculate the Least Common Multiple or LCM

Remember, to find the LCM of several numbers you must multiply the common and uncommon prime factors with the greatest exponent of those numbers.

LCM = 21. 31. 1071 = 642


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