What is the Greatest Common Factor of 16561 and 16580?

Greatest common factor (GCF) of 16561 and 16580 is 1.

GCF(16561,16580) = 1

We will now calculate the prime factors of 16561 and 16580, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 16561 and 16580.

How to find the GCF of 16561 and 16580?

We will first find the prime factorization of 16561 and 16580. After we will calculate the factors of 16561 and 16580 and find the biggest common factor number .

Step-1: Prime Factorization of 16561

Prime factors of 16561 are 16561. Prime factorization of 16561 in exponential form is:

16561 = 16561¹

Step-2: Prime Factorization of 16580

Prime factors of 16580 are 2, 5, 829. Prime factorization of 16580 in exponential form is:

16580 = 2² × 5¹ × 829¹

Step-3: Factors of 16561

List of positive integer factors of 16561 that divides 16561 without a remainder.

Step-4: Factors of 16580

List of positive integer factors of 16580 that divides 16561 without a remainder.

1, 2, 4, 5, 10, 20, 829, 1658, 3316, 4145, 8290

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 16561 and 16580. The biggest common factor number is the GCF number.
So the greatest common factor 16561 and 16580 is 1.

Also check out the Least Common Multiple of 16561 and 16580