What is the Greatest Common Factor of 820 and 836?

Greatest common factor (GCF) of 820 and 836 is 4.

GCF(820,836) = 4

We will now calculate the prime factors of 820 and 836, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 820 and 836.

How to find the GCF of 820 and 836?

We will first find the prime factorization of 820 and 836. After we will calculate the factors of 820 and 836 and find the biggest common factor number .

Step-1: Prime Factorization of 820

Prime factors of 820 are 2, 5, 41. Prime factorization of 820 in exponential form is:

820 = 2² × 5¹ × 41¹

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 820

List of positive integer factors of 820 that divides 820 without a remainder.

1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410

Step-4: Factors of 836

List of positive integer factors of 836 that divides 820 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 820 and 836. The biggest common factor number is the GCF number.
So the greatest common factor 820 and 836 is 4.

Also check out the Least Common Multiple of 820 and 836