What is the Greatest Common Factor of 855 and 859?

Greatest common factor (GCF) of 855 and 859 is 1.

GCF(855,859) = 1

We will now calculate the prime factors of 855 and 859, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 855 and 859.

How to find the GCF of 855 and 859?

We will first find the prime factorization of 855 and 859. After we will calculate the factors of 855 and 859 and find the biggest common factor number .

Step-1: Prime Factorization of 855

Prime factors of 855 are 3, 5, 19. Prime factorization of 855 in exponential form is:

855 = 3² × 5¹ × 19¹

Step-2: Prime Factorization of 859

Prime factors of 859 are 859. Prime factorization of 859 in exponential form is:

859 = 859¹

Step-3: Factors of 855

List of positive integer factors of 855 that divides 855 without a remainder.

1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285

Step-4: Factors of 859

List of positive integer factors of 859 that divides 855 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 855 and 859. The biggest common factor number is the GCF number.
So the greatest common factor 855 and 859 is 1.

Also check out the Least Common Multiple of 855 and 859