Greatest Common Factor of 660 and 765
GCF(660, 765) = 15, Greatest common factor of 660 and 765 is 15. 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 660 and 765. Greatest Common Factor by prime factorization method and Greatest Common Factor by matching factors method.
Greatest Common Factor of 660 and 765 by prime factorization method
We will first find the prime factorization of 660 and 765.
Prime Factorization of 660 is 1, 2, 2, 3, 5, 11 and Prime Factorization of 765 is 1, 3, 3, 5, 17.
- Factorize\( (660) = \) \(1\times 2\times 2\times 3\times 5\times 11\)
- Factorize\( (765) = \) \(1\times 3\times 3\times 5\times 17\)
Now we need to find any which are common for each number (1, 3, 5) and multiply these numbers together.
\(GCF(660, 765) = 1\times 3\times 5 = 15\).
Greatest Common Factor of 660 and 765 by matching factors method
List of positive integers factors of 660 leaving a remainder zero is 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660
List of positive integers factors of 765 leaving a remainder zero is 1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765
As you can see, 15 is the greatest and common number that 660 and 765 divides into.
So the greatest common factor 660 and 765 is 15.
\(GCF(660, 765) = 15\).
If you want to learn more about greatest common divisor, take a look at the Wikipedia page.
