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You are watching: What is the lcm of 3 and 21

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We think you wrote:

lcm(3,15,21)

This encounters the least typical multiple (LCM) by prime factorization.


1. discover the prime factors of 3

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2. uncover the prime components of 15

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Tree watch of the prime components of 15: 3 and also 5

The prime components of 15 space 3 and 5.


Determine the maximum variety of times each prime aspect (3, 5, 7) wake up in the administer of the given numbers: