What is the Greatest Common Factor of 64775 and 64780?

Greatest common factor (GCF) of 64775 and 64780 is 5.

GCF(64775,64780) = 5

We will now calculate the prime factors of 64775 and 64780, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 64775 and 64780.

How to find the GCF of 64775 and 64780?

We will first find the prime factorization of 64775 and 64780. After we will calculate the factors of 64775 and 64780 and find the biggest common factor number .

Step-1: Prime Factorization of 64775

Prime factors of 64775 are 5, 2591. Prime factorization of 64775 in exponential form is:

64775 = 5² × 2591¹

Step-2: Prime Factorization of 64780

Prime factors of 64780 are 2, 5, 41, 79. Prime factorization of 64780 in exponential form is:

64780 = 2² × 5¹ × 41¹ × 79¹

Step-3: Factors of 64775

List of positive integer factors of 64775 that divides 64775 without a remainder.

1, 5, 25, 2591, 12955

Step-4: Factors of 64780

List of positive integer factors of 64780 that divides 64775 without a remainder.

1, 2, 4, 5, 10, 20, 41, 79, 82, 158, 164, 205, 316, 395, 410, 790, 820, 1580, 3239, 6478, 12956, 16195, 32390

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 64775 and 64780. The biggest common factor number is the GCF number.
So the greatest common factor 64775 and 64780 is 5.

Also check out the Least Common Multiple of 64775 and 64780