What is the Greatest Common Factor of 64405 and 64420?

Greatest common factor (GCF) of 64405 and 64420 is 5.

GCF(64405,64420) = 5

We will now calculate the prime factors of 64405 and 64420, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 64405 and 64420.

How to find the GCF of 64405 and 64420?

We will first find the prime factorization of 64405 and 64420. After we will calculate the factors of 64405 and 64420 and find the biggest common factor number .

Step-1: Prime Factorization of 64405

Prime factors of 64405 are 5, 11, 1171. Prime factorization of 64405 in exponential form is:

64405 = 5¹ × 11¹ × 1171¹

Step-2: Prime Factorization of 64420

Prime factors of 64420 are 2, 5, 3221. Prime factorization of 64420 in exponential form is:

64420 = 2² × 5¹ × 3221¹

Step-3: Factors of 64405

List of positive integer factors of 64405 that divides 64405 without a remainder.

1, 5, 11, 55, 1171, 5855, 12881

Step-4: Factors of 64420

List of positive integer factors of 64420 that divides 64405 without a remainder.

1, 2, 4, 5, 10, 20, 3221, 6442, 12884, 16105, 32210

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 64405 and 64420. The biggest common factor number is the GCF number.
So the greatest common factor 64405 and 64420 is 5.

Also check out the Least Common Multiple of 64405 and 64420