What is the Greatest Common Factor of 7785 and 7805?

Greatest common factor (GCF) of 7785 and 7805 is 5.

GCF(7785,7805) = 5

We will now calculate the prime factors of 7785 and 7805, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 7785 and 7805.

How to find the GCF of 7785 and 7805?

We will first find the prime factorization of 7785 and 7805. After we will calculate the factors of 7785 and 7805 and find the biggest common factor number .

Step-1: Prime Factorization of 7785

Prime factors of 7785 are 3, 5, 173. Prime factorization of 7785 in exponential form is:

7785 = 3² × 5¹ × 173¹

Step-2: Prime Factorization of 7805

Prime factors of 7805 are 5, 7, 223. Prime factorization of 7805 in exponential form is:

7805 = 5¹ × 7¹ × 223¹

Step-3: Factors of 7785

List of positive integer factors of 7785 that divides 7785 without a remainder.

1, 3, 5, 9, 15, 45, 173, 519, 865, 1557, 2595

Step-4: Factors of 7805

List of positive integer factors of 7805 that divides 7785 without a remainder.

1, 5, 7, 35, 223, 1115, 1561

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 7785 and 7805. The biggest common factor number is the GCF number.
So the greatest common factor 7785 and 7805 is 5.

Also check out the Least Common Multiple of 7785 and 7805