Solution: The GCF of 1 and 123 is 1
Methods
How to Find the GCF of 1 and 123 by Listing All Common Factors
To get started using this method of finding the Greatest Common Factor of [n] and [m], we should first find and list all the factors of each number. You can see how this is done by looking at the “Factors of” articles that are linked to below.
Let’s take a look at the factors for each of these numbers, 1 and 123:
Factors of 1 : 1
Factors of 123 : 1, 3, 41, 123
When you compare the two lists of factors, you can see that the only common factor is 1. So, in this case, the GCF of 1 and 123 is 1.
Continue Practicing by Finding the GCF of Other Numbers
Take a look at some of our other walkthroughs, and you’ll be sure to be an expert at finding the GCF of any numbers in no time!
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