What is the Greatest Common Factor of 78855 and 78860?

Greatest common factor (GCF) of 78855 and 78860 is 5.

GCF(78855,78860) = 5

We will now calculate the prime factors of 78855 and 78860, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78855 and 78860.

How to find the GCF of 78855 and 78860?

We will first find the prime factorization of 78855 and 78860. After we will calculate the factors of 78855 and 78860 and find the biggest common factor number .

Step-1: Prime Factorization of 78855

Prime factors of 78855 are 3, 5, 7, 751. Prime factorization of 78855 in exponential form is:

78855 = 3¹ × 5¹ × 7¹ × 751¹

Step-2: Prime Factorization of 78860

Prime factors of 78860 are 2, 5, 3943. Prime factorization of 78860 in exponential form is:

78860 = 2² × 5¹ × 3943¹

Step-3: Factors of 78855

List of positive integer factors of 78855 that divides 78855 without a remainder.

1, 3, 5, 7, 15, 21, 35, 105, 751, 2253, 3755, 5257, 11265, 15771, 26285

Step-4: Factors of 78860

List of positive integer factors of 78860 that divides 78855 without a remainder.

1, 2, 4, 5, 10, 20, 3943, 7886, 15772, 19715, 39430

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78855 and 78860. The biggest common factor number is the GCF number.
So the greatest common factor 78855 and 78860 is 5.

Also check out the Least Common Multiple of 78855 and 78860