What is the Greatest Common Factor of 18561 and 18580?

Greatest common factor (GCF) of 18561 and 18580 is 1.

GCF(18561,18580) = 1

We will now calculate the prime factors of 18561 and 18580, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18561 and 18580.

How to find the GCF of 18561 and 18580?

We will first find the prime factorization of 18561 and 18580. After we will calculate the factors of 18561 and 18580 and find the biggest common factor number .

Step-1: Prime Factorization of 18561

Prime factors of 18561 are 3, 23, 269. Prime factorization of 18561 in exponential form is:

18561 = 3¹ × 23¹ × 269¹

Step-2: Prime Factorization of 18580

Prime factors of 18580 are 2, 5, 929. Prime factorization of 18580 in exponential form is:

18580 = 2² × 5¹ × 929¹

Step-3: Factors of 18561

List of positive integer factors of 18561 that divides 18561 without a remainder.

1, 3, 23, 69, 269, 807, 6187

Step-4: Factors of 18580

List of positive integer factors of 18580 that divides 18561 without a remainder.

1, 2, 4, 5, 10, 20, 929, 1858, 3716, 4645, 9290

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18561 and 18580. The biggest common factor number is the GCF number.
So the greatest common factor 18561 and 18580 is 1.

Also check out the Least Common Multiple of 18561 and 18580