LCM of 23 and 21

LCM of 23 and 21 is 483

What is LCM?

LCM stands for the least common multiple. The LCM of two numbers, such as 23 and 21, is the smallest number that is divisible by both 23and 21 without producing a remainder.

How to calculate the Lcm of 23 and 21

You can calculate the LCM of 23 and 21 by using any of the two methods listed below.

Method 1: By Prime Factorization

Step 1: Find the prime factors of 23


Step 2: Find the prime factors of 21

3 X 7

Step 3: List the Prime factors of 23 and 21 the greatest number of times they occur.

3 X 7 X 23

Step 4: Multiply the answer above to get the lcm  of 23 and 21  which is: 483

Method 2: LCM by Long division

We can also find the LCM of numbers using the long division method. Look at the image below to find out how to find LCM using Long division.

Answer: 483

LCM calculator

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