What is the Greatest Common Factor of 77820 and 77830?

Greatest common factor (GCF) of 77820 and 77830 is 10.

GCF(77820,77830) = 10

We will now calculate the prime factors of 77820 and 77830, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 77820 and 77830.

How to find the GCF of 77820 and 77830?

We will first find the prime factorization of 77820 and 77830. After we will calculate the factors of 77820 and 77830 and find the biggest common factor number .

Step-1: Prime Factorization of 77820

Prime factors of 77820 are 2, 3, 5, 1297. Prime factorization of 77820 in exponential form is:

77820 = 2² × 3¹ × 5¹ × 1297¹

Step-2: Prime Factorization of 77830

Prime factors of 77830 are 2, 5, 43, 181. Prime factorization of 77830 in exponential form is:

77830 = 2¹ × 5¹ × 43¹ × 181¹

Step-3: Factors of 77820

List of positive integer factors of 77820 that divides 77820 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 1297, 2594, 3891, 5188, 6485, 7782, 12970, 15564, 19455, 25940, 38910

Step-4: Factors of 77830

List of positive integer factors of 77830 that divides 77820 without a remainder.

1, 2, 5, 10, 43, 86, 181, 215, 362, 430, 905, 1810, 7783, 15566, 38915

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 77820 and 77830. The biggest common factor number is the GCF number.
So the greatest common factor 77820 and 77830 is 10.

Also check out the Least Common Multiple of 77820 and 77830