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LCM of 5 and 20

What is the LCM of 5 and 20? - The LCM of 5 and 20 is 20. Follow the step by step instructions on how to find the least common multiple of 5 and 20.

Least Common Multiple of 5 and 20

Number 1:
Number 2:

What is the least common multiple of 5 and 20?

Answer: 20

How to find the lcm of 5 and 20?

Method 1 - Listing Multiples

To find the lcm of 5 and 20, we first need to find the multiples of 5 and 20 and then choose the least common multiple that are dividable by 5 and 20.

Multiples of 5 = 5, 10, 15, 20
Multiples of 20 = 20

The least common multiple of 5 and 20 is 20, because 20 is the smallest number that is divisible by both 5 and 20.





Method 2 - Prime Factorization

Another method to find the least common multiple of 5 and 20 is by using the prime factorization method.
To use prime factorization, we first need to find the prime factors of 5 and 20, and then get the LCM by multiplying the prime factors that are rasied to their highest power from the two sets.

Prime factorization of 5 = 5
Prime factorization of 20 = 2 x 2 x 5 = 22 x 5
Prime factors to the highest power = 22 x 5 = 20

LCM of 4 and 20
LCM of 6 and 20
LCM of 5 and 21
LCM of 5 and 19

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