Greatest Common Factor of 664 and 720
GCF(664, 720) = 8, Greatest common factor of 664 and 720 is 8. Greatest Common Factor or Greatest Common Divisor of two numbers is the largest integer by which both the numbers can be divided. There are two different methods to calculate Greatest Common Factor of 664 and 720. Greatest Common Factor by prime factorization method and Greatest Common Factor by matching factors method.
Greatest Common Factor of 664 and 720 by prime factorization method
We will first find the prime factorization of 664 and 720.
Prime Factorization of 664 is 1, 2, 2, 2, 83 and Prime Factorization of 720 is 1, 2, 2, 2, 2, 3, 3, 5.
- Factorize\( (664) = \) \(1\times 2\times 2\times 2\times 83\)
- Factorize\( (720) = \) \(1\times 2\times 2\times 2\times 2\times 3\times 3\times 5\)
Now we need to find any which are common for each number (1, 2, 2, 2) and multiply these numbers together.
\(GCF(664, 720) = 1\times 2\times 2\times 2 = 8\).
Greatest Common Factor of 664 and 720 by matching factors method
List of positive integers factors of 664 leaving a remainder zero is 1, 2, 4, 8, 83, 166, 332, 664
List of positive integers factors of 720 leaving a remainder zero is 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720
As you can see, 8 is the greatest and common number that 664 and 720 divides into.
So the greatest common factor 664 and 720 is 8.
\(GCF(664, 720) = 8\).
If you want to learn more about greatest common divisor, take a look at the Wikipedia page.
