What is the Greatest Common Factor of 64785 and 64805?

Greatest common factor (GCF) of 64785 and 64805 is 5.

GCF(64785,64805) = 5

We will now calculate the prime factors of 64785 and 64805, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 64785 and 64805.

How to find the GCF of 64785 and 64805?

We will first find the prime factorization of 64785 and 64805. After we will calculate the factors of 64785 and 64805 and find the biggest common factor number .

Step-1: Prime Factorization of 64785

Prime factors of 64785 are 3, 5, 7, 617. Prime factorization of 64785 in exponential form is:

64785 = 3¹ × 5¹ × 7¹ × 617¹

Step-2: Prime Factorization of 64805

Prime factors of 64805 are 5, 13, 997. Prime factorization of 64805 in exponential form is:

64805 = 5¹ × 13¹ × 997¹

Step-3: Factors of 64785

List of positive integer factors of 64785 that divides 64785 without a remainder.

1, 3, 5, 7, 15, 21, 35, 105, 617, 1851, 3085, 4319, 9255, 12957, 21595

Step-4: Factors of 64805

List of positive integer factors of 64805 that divides 64785 without a remainder.

1, 5, 13, 65, 997, 4985, 12961

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 64785 and 64805. The biggest common factor number is the GCF number.
So the greatest common factor 64785 and 64805 is 5.

Also check out the Least Common Multiple of 64785 and 64805