What is the Greatest Common Factor of 8720 and 8740?

Greatest common factor (GCF) of 8720 and 8740 is 20.

GCF(8720,8740) = 20

We will now calculate the prime factors of 8720 and 8740, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 8720 and 8740.

How to find the GCF of 8720 and 8740?

We will first find the prime factorization of 8720 and 8740. After we will calculate the factors of 8720 and 8740 and find the biggest common factor number .

Step-1: Prime Factorization of 8720

Prime factors of 8720 are 2, 5, 109. Prime factorization of 8720 in exponential form is:

8720 = 2⁴ × 5¹ × 109¹

Step-2: Prime Factorization of 8740

Prime factors of 8740 are 2, 5, 19, 23. Prime factorization of 8740 in exponential form is:

8740 = 2² × 5¹ × 19¹ × 23¹

Step-3: Factors of 8720

List of positive integer factors of 8720 that divides 8720 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 4360

Step-4: Factors of 8740

List of positive integer factors of 8740 that divides 8720 without a remainder.

1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 190, 230, 380, 437, 460, 874, 1748, 2185, 4370

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 8720 and 8740. The biggest common factor number is the GCF number.
So the greatest common factor 8720 and 8740 is 20.

Also check out the Least Common Multiple of 8720 and 8740