Solution: The LCM of 57 and 118 is 6726
Methods
How to find the LCM of 57 and 118 using Prime Factorization
One way to find the LCM of 57 and 118 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 57?
What are the Factors of 118?
Here is the prime factorization of 57:
3
1
×
1
9
1
3^1 × 19^1
3 1 × 1 9 1
And this is the prime factorization of 118:
2
1
×
5
9
1
2^1 × 59^1
2 1 × 5 9 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, 19, 2, 59
2
1
×
3
1
×
1
9
1
×
5
9
1
=
6726
2^1 × 3^1 × 19^1 × 59^1 = 6726
2 1 × 3 1 × 1 9 1 × 5 9 1 = 6726
Through this we see that the LCM of 57 and 118 is 6726.
How to Find the LCM of 57 and 118 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 57 and 118 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, 57 and 118:
What are the Multiples of 57?
What are the Multiples of 118?
Let’s take a look at the first 10 multiples for each of these numbers, 57 and 118:
First 10 Multiples of 57: 57, 114, 171, 228, 285, 342, 399, 456, 513, 570
First 10 Multiples of 118: 118, 236, 354, 472, 590, 708, 826, 944, 1062, 1180
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 57 and 118 are 6726, 13452, 20178. Because 6726 is the smallest, it is the least common multiple.
The LCM of 57 and 118 is 6726.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 70 and 127?
What is the LCM of 120 and 11?
What is the LCM of 103 and 105?
What is the LCM of 30 and 104?
What is the LCM of 10 and 129?