Solution: The GCF of 56 and 14 is 14
Methods
How to find the GCF of 56 and 14 using Prime Factorization
One way to find the GCF of 56 and 14 is to compare 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 56?
What are the Factors of 14?
Here is the prime factorization of 56:
2
3
×
7
1
2^3 × 7^1
2 3 × 7 1
And this is the prime factorization of 14:
2
1
×
7
1
2^1 × 7^1
2 1 × 7 1
When you compare the prime factorization of these two numbers, you can see that there are matching prime factors. You can now find the Greatest Common Factor of 56 and 14 by multiplying all the matching prime factors to get a GCF of 56 and 14 as 196:
Thus, the GCF of 56 and 14 is: 196
How to Find the GCF of 56 and 14 by Listing All Common Factors
The first step to this method of finding the Greatest Common Factor of 56 and 14 is to find and list all the factors of each number. Again, you can see how this is done by looking at the “Factors of” articles that are linked to above.
Let’s take a look at the factors for each of these numbers, 56 and 14:
Factors of 56: 1, 2, 4, 7, 8, 14, 28, 56
Factors of 14: 1, 2, 7, 14
When you compare the two lists of factors, you can see that the common factor(s) are 1, 2, 7, 14. Since 14 is the largest of these common factors, the GCF of 56 and 14 would be 14.
Find the GCF of Other Number Pairs
Want more practice? Try some of these other GCF problems:
What is the GCF of 93 and 1?
What is the GCF of 23 and 76?
What is the GCF of 3 and 121?
What is the GCF of 58 and 49?
What is the GCF of 25 and 126?