What is the Greatest Common Factor of 855 and 869?

Greatest common factor (GCF) of 855 and 869 is 1.

GCF(855,869) = 1

We will now calculate the prime factors of 855 and 869, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 855 and 869.

How to find the GCF of 855 and 869?

We will first find the prime factorization of 855 and 869. After we will calculate the factors of 855 and 869 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 869

Prime factors of 869 are 11, 79. Prime factorization of 869 in exponential form is:

869 = 11¹ × 79¹

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 869

List of positive integer factors of 869 that divides 855 without a remainder.

1, 11, 79

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 855 and 869. The biggest common factor number is the GCF number.
So the greatest common factor 855 and 869 is 1.

Also check out the Least Common Multiple of 855 and 869