What is the Greatest Common Factor of 817 and 836?

Greatest common factor (GCF) of 817 and 836 is 19.

GCF(817,836) = 19

We will now calculate the prime factors of 817 and 836, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 817 and 836.

How to find the GCF of 817 and 836?

We will first find the prime factorization of 817 and 836. After we will calculate the factors of 817 and 836 and find the biggest common factor number .

Step-1: Prime Factorization of 817

Prime factors of 817 are 19, 43. Prime factorization of 817 in exponential form is:

817 = 19¹ × 43¹

Step-2: Prime Factorization of 836

Prime factors of 836 are 2, 11, 19. Prime factorization of 836 in exponential form is:

836 = 2² × 11¹ × 19¹

Step-3: Factors of 817

List of positive integer factors of 817 that divides 817 without a remainder.

1, 19, 43

Step-4: Factors of 836

List of positive integer factors of 836 that divides 817 without a remainder.

1, 2, 4, 11, 19, 22, 38, 44, 76, 209, 418

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 817 and 836. The biggest common factor number is the GCF number.
So the greatest common factor 817 and 836 is 19.

Also check out the Least Common Multiple of 817 and 836