What is the Greatest Common Factor of 15680 and 15685?

Greatest common factor (GCF) of 15680 and 15685 is 5.

GCF(15680,15685) = 5

We will now calculate the prime factors of 15680 and 15685, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15680 and 15685.

How to find the GCF of 15680 and 15685?

We will first find the prime factorization of 15680 and 15685. After we will calculate the factors of 15680 and 15685 and find the biggest common factor number .

Step-1: Prime Factorization of 15680

Prime factors of 15680 are 2, 5, 7. Prime factorization of 15680 in exponential form is:

15680 = 2⁶ × 5¹ × 7²

Step-2: Prime Factorization of 15685

Prime factors of 15685 are 5, 3137. Prime factorization of 15685 in exponential form is:

15685 = 5¹ × 3137¹

Step-3: Factors of 15680

List of positive integer factors of 15680 that divides 15680 without a remainder.

1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 320, 392, 448, 490, 560, 784, 980, 1120, 1568, 1960, 2240, 3136, 3920, 7840

Step-4: Factors of 15685

List of positive integer factors of 15685 that divides 15680 without a remainder.

1, 5, 3137

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15680 and 15685. The biggest common factor number is the GCF number.
So the greatest common factor 15680 and 15685 is 5.

Also check out the Least Common Multiple of 15680 and 15685