What is the Greatest Common Factor of 64809 and 64815?

Greatest common factor (GCF) of 64809 and 64815 is 3.

GCF(64809,64815) = 3

We will now calculate the prime factors of 64809 and 64815, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 64809 and 64815.

How to find the GCF of 64809 and 64815?

We will first find the prime factorization of 64809 and 64815. After we will calculate the factors of 64809 and 64815 and find the biggest common factor number .

Step-1: Prime Factorization of 64809

Prime factors of 64809 are 3, 19, 379. Prime factorization of 64809 in exponential form is:

64809 = 3² × 19¹ × 379¹

Step-2: Prime Factorization of 64815

Prime factors of 64815 are 3, 5, 29, 149. Prime factorization of 64815 in exponential form is:

64815 = 3¹ × 5¹ × 29¹ × 149¹

Step-3: Factors of 64809

List of positive integer factors of 64809 that divides 64809 without a remainder.

1, 3, 9, 19, 57, 171, 379, 1137, 3411, 7201, 21603

Step-4: Factors of 64815

List of positive integer factors of 64815 that divides 64809 without a remainder.

1, 3, 5, 15, 29, 87, 145, 149, 435, 447, 745, 2235, 4321, 12963, 21605

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 64809 and 64815. The biggest common factor number is the GCF number.
So the greatest common factor 64809 and 64815 is 3.

Also check out the Least Common Multiple of 64809 and 64815