Solution: The LCM of 44 and 15 is 660
Methods
How to find the LCM of 44 and 15 using Prime Factorization
One way to find the LCM of 44 and 15 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 44?
What are the Factors of 15?
Here is the prime factorization of 44:
2
2
×
1
1
1
2^2 × 11^1
2 2 × 1 1 1
And this is the prime factorization of 15:
3
1
×
5
1
3^1 × 5^1
3 1 × 5 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: 2, 11, 3, 5
2
2
×
3
1
×
5
1
×
1
1
1
=
660
2^2 × 3^1 × 5^1 × 11^1 = 660
2 2 × 3 1 × 5 1 × 1 1 1 = 660
Through this we see that the LCM of 44 and 15 is 660.
How to Find the LCM of 44 and 15 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 44 and 15 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, 44 and 15:
What are the Multiples of 44?
What are the Multiples of 15?
Let’s take a look at the first 10 multiples for each of these numbers, 44 and 15:
First 10 Multiples of 44: 44, 88, 132, 176, 220, 264, 308, 352, 396, 440
First 10 Multiples of 15: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150
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 44 and 15 are 660, 1320, 1980. Because 660 is the smallest, it is the least common multiple.
The LCM of 44 and 15 is 660.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 14 and 67?
What is the LCM of 124 and 119?
What is the LCM of 58 and 143?
What is the LCM of 121 and 32?
What is the LCM of 2 and 148?