What is the Greatest Common Factor of 7985 and 7990?

Greatest common factor (GCF) of 7985 and 7990 is 5.

GCF(7985,7990) = 5

We will now calculate the prime factors of 7985 and 7990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 7985 and 7990.

How to find the GCF of 7985 and 7990?

We will first find the prime factorization of 7985 and 7990. After we will calculate the factors of 7985 and 7990 and find the biggest common factor number .

Step-1: Prime Factorization of 7985

Prime factors of 7985 are 5, 1597. Prime factorization of 7985 in exponential form is:

7985 = 5¹ × 1597¹

Step-2: Prime Factorization of 7990

Prime factors of 7990 are 2, 5, 17, 47. Prime factorization of 7990 in exponential form is:

7990 = 2¹ × 5¹ × 17¹ × 47¹

Step-3: Factors of 7985

List of positive integer factors of 7985 that divides 7985 without a remainder.

1, 5, 1597

Step-4: Factors of 7990

List of positive integer factors of 7990 that divides 7985 without a remainder.

1, 2, 5, 10, 17, 34, 47, 85, 94, 170, 235, 470, 799, 1598, 3995

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 7985 and 7990. The biggest common factor number is the GCF number.
So the greatest common factor 7985 and 7990 is 5.

Also check out the Least Common Multiple of 7985 and 7990