Greatest Common Factor of 100 and 644
GCF(100, 644) = 4, Greatest common factor of 100 and 644 is 4. 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 100 and 644. Greatest Common Factor by prime factorization method and Greatest Common Factor by matching factors method.
Greatest Common Factor of 100 and 644 by prime factorization method
We will first find the prime factorization of 100 and 644.
Prime Factorization of 100 is 1, 2, 2, 5, 5 and Prime Factorization of 644 is 1, 2, 2, 7, 23.
- Factorize\( (100) = \) \(1\times 2\times 2\times 5\times 5\)
- Factorize\( (644) = \) \(1\times 2\times 2\times 7\times 23\)
Now we need to find any which are common for each number (1, 2, 2) and multiply these numbers together.
\(GCF(100, 644) = 1\times 2\times 2 = 4\).
Greatest Common Factor of 100 and 644 by matching factors method
List of positive integers factors of 100 leaving a remainder zero is 1, 2, 4, 5, 10, 20, 25, 50, 100
List of positive integers factors of 644 leaving a remainder zero is 1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644
As you can see, 4 is the greatest and common number that 100 and 644 divides into.
So the greatest common factor 100 and 644 is 4.
\(GCF(100, 644) = 4\).
If you want to learn more about greatest common divisor, take a look at the Wikipedia page.
