What is the Greatest Common Factor of 4780 and 4785?

Greatest common factor (GCF) of 4780 and 4785 is 5.

GCF(4780,4785) = 5

We will now calculate the prime factors of 4780 and 4785, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 4780 and 4785.

How to find the GCF of 4780 and 4785?

We will first find the prime factorization of 4780 and 4785. After we will calculate the factors of 4780 and 4785 and find the biggest common factor number .

Step-1: Prime Factorization of 4780

Prime factors of 4780 are 2, 5, 239. Prime factorization of 4780 in exponential form is:

4780 = 2² × 5¹ × 239¹

Step-2: Prime Factorization of 4785

Prime factors of 4785 are 3, 5, 11, 29. Prime factorization of 4785 in exponential form is:

4785 = 3¹ × 5¹ × 11¹ × 29¹

Step-3: Factors of 4780

List of positive integer factors of 4780 that divides 4780 without a remainder.

1, 2, 4, 5, 10, 20, 239, 478, 956, 1195, 2390

Step-4: Factors of 4785

List of positive integer factors of 4785 that divides 4780 without a remainder.

1, 3, 5, 11, 15, 29, 33, 55, 87, 145, 165, 319, 435, 957, 1595

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 4780 and 4785. The biggest common factor number is the GCF number.
So the greatest common factor 4780 and 4785 is 5.

Also check out the Least Common Multiple of 4780 and 4785