Solution: The LCM of 141 and 22 is 3102
Methods
How to find the LCM of 141 and 22 using Prime Factorization
One way to find the LCM of 141 and 22 is to start by comparing the prime factorization of each number. To find the prime factorization, you can follow the instructions for each number here:
What are the Factors of 141?
What are the Factors of 22?
Here is the prime factorization of 141:
3
1
×
4
7
1
3^1 × 47^1
3 1 × 4 7 1
And this is the prime factorization of 22:
2
1
×
1
1
1
2^1 × 11^1
2 1 × 1 1 1
When you compare the prime factorization of these two numbers, you want to look for the highest power that each prime factor is raised to. In this case, there are these prime factors to consider: 3, 47, 2, 11
2
1
×
3
1
×
1
1
1
×
4
7
1
=
3102
2^1 × 3^1 × 11^1 × 47^1 = 3102
2 1 × 3 1 × 1 1 1 × 4 7 1 = 3102
Through this we see that the LCM of 141 and 22 is 3102.
How to Find the LCM of 141 and 22 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 141 and 22 is to begin to list a few multiples for each number. If you need a refresher on how to find the multiples of these numbers, you can see the walkthroughs in the links below for each number.
Let’s take a look at the multiples for each of these numbers, 141 and 22:
What are the Multiples of 141?
What are the Multiples of 22?
Let’s take a look at the first 10 multiples for each of these numbers, 141 and 22:
First 10 Multiples of 141: 141, 282, 423, 564, 705, 846, 987, 1128, 1269, 1410
First 10 Multiples of 22: 22, 44, 66, 88, 110, 132, 154, 176, 198, 220
You can continue to list out the multiples of these numbers as long as needed to find a match. Once you do find a match, or several matches, the smallest of these matches would be the Least Common Multiple. For instance, the first matching multiple(s) of 141 and 22 are 3102, 6204, 9306. Because 3102 is the smallest, it is the least common multiple.
The LCM of 141 and 22 is 3102.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 88 and 2?
What is the LCM of 59 and 7?
What is the LCM of 139 and 61?
What is the LCM of 30 and 125?
What is the LCM of 76 and 129?