What is the Greatest Common Factor of 68415 and 68421?

Greatest common factor (GCF) of 68415 and 68421 is 3.

GCF(68415,68421) = 3

We will now calculate the prime factors of 68415 and 68421, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 68415 and 68421.

How to find the GCF of 68415 and 68421?

We will first find the prime factorization of 68415 and 68421. After we will calculate the factors of 68415 and 68421 and find the biggest common factor number .

Step-1: Prime Factorization of 68415

Prime factors of 68415 are 3, 5, 4561. Prime factorization of 68415 in exponential form is:

68415 = 3¹ × 5¹ × 4561¹

Step-2: Prime Factorization of 68421

Prime factors of 68421 are 3, 22807. Prime factorization of 68421 in exponential form is:

68421 = 3¹ × 22807¹

Step-3: Factors of 68415

List of positive integer factors of 68415 that divides 68415 without a remainder.

1, 3, 5, 15, 4561, 13683, 22805

Step-4: Factors of 68421

List of positive integer factors of 68421 that divides 68415 without a remainder.

1, 3, 22807

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 68415 and 68421. The biggest common factor number is the GCF number.
So the greatest common factor 68415 and 68421 is 3.

Also check out the Least Common Multiple of 68415 and 68421