Solution: The LCM of 127 and 51 is 6477
Methods
How to find the LCM of 127 and 51 using Prime Factorization
One way to find the LCM of 127 and 51 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 127?
What are the Factors of 51?
Here is the prime factorization of 127:
12
7
1
127^1
12 7 1
And this is the prime factorization of 51:
3
1
×
1
7
1
3^1 × 17^1
3 1 × 1 7 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: 127, 3, 17
3
1
×
1
7
1
×
12
7
1
=
6477
3^1 × 17^1 × 127^1 = 6477
3 1 × 1 7 1 × 12 7 1 = 6477
Through this we see that the LCM of 127 and 51 is 6477.
How to Find the LCM of 127 and 51 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 127 and 51 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, 127 and 51:
What are the Multiples of 127?
What are the Multiples of 51?
Let’s take a look at the first 10 multiples for each of these numbers, 127 and 51:
First 10 Multiples of 127: 127, 254, 381, 508, 635, 762, 889, 1016, 1143, 1270
First 10 Multiples of 51: 51, 102, 153, 204, 255, 306, 357, 408, 459, 510
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 127 and 51 are 6477, 12954, 19431. Because 6477 is the smallest, it is the least common multiple.
The LCM of 127 and 51 is 6477.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 141 and 57?
What is the LCM of 114 and 142?
What is the LCM of 99 and 112?
What is the LCM of 71 and 145?
What is the LCM of 77 and 73?