What is the Greatest Common Factor of 855 and 862?

Greatest common factor (GCF) of 855 and 862 is 1.

GCF(855,862) = 1

We will now calculate the prime factors of 855 and 862, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 855 and 862.

How to find the GCF of 855 and 862?

We will first find the prime factorization of 855 and 862. After we will calculate the factors of 855 and 862 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 862

Prime factors of 862 are 2, 431. Prime factorization of 862 in exponential form is:

862 = 2¹ × 431¹

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 862

List of positive integer factors of 862 that divides 855 without a remainder.

1, 2, 431

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 855 and 862. The biggest common factor number is the GCF number.
So the greatest common factor 855 and 862 is 1.

Also check out the Least Common Multiple of 855 and 862