What is the Greatest Common Factor of 64985 and 64990?

Greatest common factor (GCF) of 64985 and 64990 is 5.

GCF(64985,64990) = 5

We will now calculate the prime factors of 64985 and 64990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 64985 and 64990.

How to find the GCF of 64985 and 64990?

We will first find the prime factorization of 64985 and 64990. After we will calculate the factors of 64985 and 64990 and find the biggest common factor number .

Step-1: Prime Factorization of 64985

Prime factors of 64985 are 5, 41, 317. Prime factorization of 64985 in exponential form is:

64985 = 5¹ × 41¹ × 317¹

Step-2: Prime Factorization of 64990

Prime factors of 64990 are 2, 5, 67, 97. Prime factorization of 64990 in exponential form is:

64990 = 2¹ × 5¹ × 67¹ × 97¹

Step-3: Factors of 64985

List of positive integer factors of 64985 that divides 64985 without a remainder.

1, 5, 41, 205, 317, 1585, 12997

Step-4: Factors of 64990

List of positive integer factors of 64990 that divides 64985 without a remainder.

1, 2, 5, 10, 67, 97, 134, 194, 335, 485, 670, 970, 6499, 12998, 32495

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 64985 and 64990. The biggest common factor number is the GCF number.
So the greatest common factor 64985 and 64990 is 5.

Also check out the Least Common Multiple of 64985 and 64990