What is the Greatest Common Factor of 7780 and 7790?

Greatest common factor (GCF) of 7780 and 7790 is 10.

GCF(7780,7790) = 10

We will now calculate the prime factors of 7780 and 7790, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 7780 and 7790.

How to find the GCF of 7780 and 7790?

We will first find the prime factorization of 7780 and 7790. After we will calculate the factors of 7780 and 7790 and find the biggest common factor number .

Step-1: Prime Factorization of 7780

Prime factors of 7780 are 2, 5, 389. Prime factorization of 7780 in exponential form is:

7780 = 2² × 5¹ × 389¹

Step-2: Prime Factorization of 7790

Prime factors of 7790 are 2, 5, 19, 41. Prime factorization of 7790 in exponential form is:

7790 = 2¹ × 5¹ × 19¹ × 41¹

Step-3: Factors of 7780

List of positive integer factors of 7780 that divides 7780 without a remainder.

1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890

Step-4: Factors of 7790

List of positive integer factors of 7790 that divides 7780 without a remainder.

1, 2, 5, 10, 19, 38, 41, 82, 95, 190, 205, 410, 779, 1558, 3895

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 7780 and 7790. The biggest common factor number is the GCF number.
So the greatest common factor 7780 and 7790 is 10.

Also check out the Least Common Multiple of 7780 and 7790