What is the Greatest Common Factor of 561 and 575?

Greatest common factor (GCF) of 561 and 575 is 1.

GCF(561,575) = 1

We will now calculate the prime factors of 561 and 575, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 561 and 575.

How to find the GCF of 561 and 575?

We will first find the prime factorization of 561 and 575. After we will calculate the factors of 561 and 575 and find the biggest common factor number .

Step-1: Prime Factorization of 561

Prime factors of 561 are 3, 11, 17. Prime factorization of 561 in exponential form is:

561 = 3¹ × 11¹ × 17¹

Step-2: Prime Factorization of 575

Prime factors of 575 are 5, 23. Prime factorization of 575 in exponential form is:

575 = 5² × 23¹

Step-3: Factors of 561

List of positive integer factors of 561 that divides 561 without a remainder.

1, 3, 11, 17, 33, 51, 187

Step-4: Factors of 575

List of positive integer factors of 575 that divides 561 without a remainder.

1, 5, 23, 25, 115

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 561 and 575. The biggest common factor number is the GCF number.
So the greatest common factor 561 and 575 is 1.

Also check out the Least Common Multiple of 561 and 575