What is the Greatest Common Factor of 545 and 558?

Greatest common factor (GCF) of 545 and 558 is 1.

GCF(545,558) = 1

We will now calculate the prime factors of 545 and 558, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 545 and 558.

How to find the GCF of 545 and 558?

We will first find the prime factorization of 545 and 558. After we will calculate the factors of 545 and 558 and find the biggest common factor number .

Step-1: Prime Factorization of 545

Prime factors of 545 are 5, 109. Prime factorization of 545 in exponential form is:

545 = 5¹ × 109¹

Step-2: Prime Factorization of 558

Prime factors of 558 are 2, 3, 31. Prime factorization of 558 in exponential form is:

558 = 2¹ × 3² × 31¹

Step-3: Factors of 545

List of positive integer factors of 545 that divides 545 without a remainder.

1, 5, 109

Step-4: Factors of 558

List of positive integer factors of 558 that divides 545 without a remainder.

1, 2, 3, 6, 9, 18, 31, 62, 93, 186, 279

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 545 and 558. The biggest common factor number is the GCF number.
So the greatest common factor 545 and 558 is 1.

Also check out the Least Common Multiple of 545 and 558