Greatest Common Factor of 660 and 990
GCF(660, 990) = 330, Greatest common factor of 660 and 990 is 330. 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 990. Greatest Common Factor by prime factorization method and Greatest Common Factor by matching factors method.
Greatest Common Factor of 660 and 990 by prime factorization method
We will first find the prime factorization of 660 and 990.
Prime Factorization of 660 is 1, 2, 2, 3, 5, 11 and Prime Factorization of 990 is 1, 2, 3, 3, 5, 11.
- Factorize\( (660) = \) \(1\times 2\times 2\times 3\times 5\times 11\)
- Factorize\( (990) = \) \(1\times 2\times 3\times 3\times 5\times 11\)
Now we need to find any which are common for each number (1, 2, 3, 5, 11) and multiply these numbers together.
\(GCF(660, 990) = 1\times 2\times 3\times 5\times 11 = 330\).
Greatest Common Factor of 660 and 990 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 990 leaving a remainder zero is 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990
As you can see, 330 is the greatest and common number that 660 and 990 divides into.
So the greatest common factor 660 and 990 is 330.
\(GCF(660, 990) = 330\).
If you want to learn more about greatest common divisor, take a look at the Wikipedia page.
