What is the Greatest Common Factor of 67815 and 67820?

Greatest common factor (GCF) of 67815 and 67820 is 5.

GCF(67815,67820) = 5

We will now calculate the prime factors of 67815 and 67820, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 67815 and 67820.

How to find the GCF of 67815 and 67820?

We will first find the prime factorization of 67815 and 67820. After we will calculate the factors of 67815 and 67820 and find the biggest common factor number .

Step-1: Prime Factorization of 67815

Prime factors of 67815 are 3, 5, 11, 137. Prime factorization of 67815 in exponential form is:

67815 = 3² × 5¹ × 11¹ × 137¹

Step-2: Prime Factorization of 67820

Prime factors of 67820 are 2, 5, 3391. Prime factorization of 67820 in exponential form is:

67820 = 2² × 5¹ × 3391¹

Step-3: Factors of 67815

List of positive integer factors of 67815 that divides 67815 without a remainder.

1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 137, 165, 411, 495, 685, 1233, 1507, 2055, 4521, 6165, 7535, 13563, 22605

Step-4: Factors of 67820

List of positive integer factors of 67820 that divides 67815 without a remainder.

1, 2, 4, 5, 10, 20, 3391, 6782, 13564, 16955, 33910

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 67815 and 67820. The biggest common factor number is the GCF number.
So the greatest common factor 67815 and 67820 is 5.

Also check out the Least Common Multiple of 67815 and 67820