Solution: The LCM of 53 and 103 is 5459
Methods
How to find the LCM of 53 and 103 using Prime Factorization
One way to find the LCM of 53 and 103 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 53?
What are the Factors of 103?
Here is the prime factorization of 53:
5
3
1
53^1
5 3 1
And this is the prime factorization of 103:
10
3
1
103^1
10 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: 53, 103
5
3
1
×
10
3
1
=
5459
53^1 × 103^1 = 5459
5 3 1 × 10 3 1 = 5459
Through this we see that the LCM of 53 and 103 is 5459.
How to Find the LCM of 53 and 103 by Listing Common Multiples
The first step to this method of finding the Least Common Multiple of 53 and 103 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, 53 and 103:
What are the Multiples of 53?
What are the Multiples of 103?
Let’s take a look at the first 10 multiples for each of these numbers, 53 and 103:
First 10 Multiples of 53: 53, 106, 159, 212, 265, 318, 371, 424, 477, 530
First 10 Multiples of 103: 103, 206, 309, 412, 515, 618, 721, 824, 927, 1030
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 53 and 103 are 5459, 10918, 16377. Because 5459 is the smallest, it is the least common multiple.
The LCM of 53 and 103 is 5459.
Find the LCM of Other Number Pairs
Want more practice? Try some of these other LCM problems:
What is the LCM of 25 and 32?
What is the LCM of 40 and 96?
What is the LCM of 31 and 63?
What is the LCM of 122 and 37?
What is the LCM of 12 and 1?