What is the Greatest Common Factor of 8640 and 8645?

Greatest common factor (GCF) of 8640 and 8645 is 5.

GCF(8640,8645) = 5

We will now calculate the prime factors of 8640 and 8645, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 8640 and 8645.

How to find the GCF of 8640 and 8645?

We will first find the prime factorization of 8640 and 8645. After we will calculate the factors of 8640 and 8645 and find the biggest common factor number .

Step-1: Prime Factorization of 8640

Prime factors of 8640 are 2, 3, 5. Prime factorization of 8640 in exponential form is:

8640 = 2⁶ × 3³ × 5¹

Step-2: Prime Factorization of 8645

Prime factors of 8645 are 5, 7, 13, 19. Prime factorization of 8645 in exponential form is:

8645 = 5¹ × 7¹ × 13¹ × 19¹

Step-3: Factors of 8640

List of positive integer factors of 8640 that divides 8640 without a remainder.

1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 64, 72, 80, 90, 96, 108, 120, 135, 144, 160, 180, 192, 216, 240, 270, 288, 320, 360, 432, 480, 540, 576, 720, 864, 960, 1080, 1440, 1728, 2160, 2880, 4320

Step-4: Factors of 8645

List of positive integer factors of 8645 that divides 8640 without a remainder.

1, 5, 7, 13, 19, 35, 65, 91, 95, 133, 247, 455, 665, 1235, 1729

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 8640 and 8645. The biggest common factor number is the GCF number.
So the greatest common factor 8640 and 8645 is 5.

Also check out the Least Common Multiple of 8640 and 8645