Solution: The LCM of 39 and 146 is 5694
Methods
How to find the LCM of 39 and 146 using Prime Factorization
One way to find the LCM of 39 and 146 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 39?
What are the Factors of 146?
Here is the prime factorization of 39:
3
1
×
1
3
1
3^1 × 13^1
3 1 × 1 3 1
And this is the prime factorization of 146:
2
1
×
7
3
1
2^1 × 73^1
2 1 × 7 3 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, 13, 2, 73
2
1
×
3
1
×
1
3
1
×
7
3
1
=
5694
2^1 × 3^1 × 13^1 × 73^1 = 5694
2 1 × 3 1 × 1 3 1 × 7 3 1 = 5694
Through this we see that the LCM of 39 and 146 is 5694.
How to Find the LCM of 39 and 146 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 39 and 146 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, 39 and 146:
What are the Multiples of 39?
What are the Multiples of 146?
Let’s take a look at the first 10 multiples for each of these numbers, 39 and 146:
First 10 Multiples of 39: 39, 78, 117, 156, 195, 234, 273, 312, 351, 390
First 10 Multiples of 146: 146, 292, 438, 584, 730, 876, 1022, 1168, 1314, 1460
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 39 and 146 are 5694, 11388, 17082. Because 5694 is the smallest, it is the least common multiple.
The LCM of 39 and 146 is 5694.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 143 and 81?
What is the LCM of 55 and 13?
What is the LCM of 46 and 11?
What is the LCM of 105 and 26?
What is the LCM of 57 and 141?