Solution: The LCM of 111 and 17 is 1887
Methods
How to find the LCM of 111 and 17 using Prime Factorization
One way to find the LCM of 111 and 17 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 111?
What are the Factors of 17?
Here is the prime factorization of 111:
3
1
×
3
7
1
3^1 × 37^1
3 1 × 3 7 1
And this is the prime factorization of 17:
1
7
1
17^1
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: 3, 37, 17
3
1
×
1
7
1
×
3
7
1
=
1887
3^1 × 17^1 × 37^1 = 1887
3 1 × 1 7 1 × 3 7 1 = 1887
Through this we see that the LCM of 111 and 17 is 1887.
How to Find the LCM of 111 and 17 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 111 and 17 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, 111 and 17:
What are the Multiples of 111?
What are the Multiples of 17?
Let’s take a look at the first 10 multiples for each of these numbers, 111 and 17:
First 10 Multiples of 111: 111, 222, 333, 444, 555, 666, 777, 888, 999, 1110
First 10 Multiples of 17: 17, 34, 51, 68, 85, 102, 119, 136, 153, 170
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 111 and 17 are 1887, 3774, 5661. Because 1887 is the smallest, it is the least common multiple.
The LCM of 111 and 17 is 1887.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 38 and 108?
What is the LCM of 30 and 71?
What is the LCM of 150 and 110?
What is the LCM of 106 and 136?
What is the LCM of 89 and 28?