What is the Greatest Common Factor of 16563 and 16581?

Greatest common factor (GCF) of 16563 and 16581 is 3.

GCF(16563,16581) = 3

We will now calculate the prime factors of 16563 and 16581, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 16563 and 16581.

How to find the GCF of 16563 and 16581?

We will first find the prime factorization of 16563 and 16581. After we will calculate the factors of 16563 and 16581 and find the biggest common factor number .

Step-1: Prime Factorization of 16563

Prime factors of 16563 are 3, 5521. Prime factorization of 16563 in exponential form is:

16563 = 3¹ × 5521¹

Step-2: Prime Factorization of 16581

Prime factors of 16581 are 3, 5527. Prime factorization of 16581 in exponential form is:

16581 = 3¹ × 5527¹

Step-3: Factors of 16563

List of positive integer factors of 16563 that divides 16563 without a remainder.

1, 3, 5521

Step-4: Factors of 16581

List of positive integer factors of 16581 that divides 16563 without a remainder.

1, 3, 5527

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 16563 and 16581. The biggest common factor number is the GCF number.
So the greatest common factor 16563 and 16581 is 3.

Also check out the Least Common Multiple of 16563 and 16581