Solution: The LCM of 22 and 139 is 3058
Methods
How to find the LCM of 22 and 139 using Prime Factorization
One way to find the LCM of 22 and 139 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 22?
What are the Factors of 139?
Here is the prime factorization of 22:
2
1
×
1
1
1
2^1 × 11^1
2 1 × 1 1 1
And this is the prime factorization of 139:
13
9
1
139^1
13 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: 2, 11, 139
2
1
×
1
1
1
×
13
9
1
=
3058
2^1 × 11^1 × 139^1 = 3058
2 1 × 1 1 1 × 13 9 1 = 3058
Through this we see that the LCM of 22 and 139 is 3058.
How to Find the LCM of 22 and 139 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 22 and 139 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, 22 and 139:
What are the Multiples of 22?
What are the Multiples of 139?
Let’s take a look at the first 10 multiples for each of these numbers, 22 and 139:
First 10 Multiples of 22: 22, 44, 66, 88, 110, 132, 154, 176, 198, 220
First 10 Multiples of 139: 139, 278, 417, 556, 695, 834, 973, 1112, 1251, 1390
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 22 and 139 are 3058, 6116, 9174. Because 3058 is the smallest, it is the least common multiple.
The LCM of 22 and 139 is 3058.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 21 and 143?
What is the LCM of 47 and 54?
What is the LCM of 77 and 105?
What is the LCM of 85 and 126?
What is the LCM of 10 and 13?