What is the Greatest Common Factor of 42543 and 42558?

Greatest common factor (GCF) of 42543 and 42558 is 3.

GCF(42543,42558) = 3

We will now calculate the prime factors of 42543 and 42558, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42543 and 42558.

How to find the GCF of 42543 and 42558?

We will first find the prime factorization of 42543 and 42558. After we will calculate the factors of 42543 and 42558 and find the biggest common factor number .

Step-1: Prime Factorization of 42543

Prime factors of 42543 are 3, 29, 163. Prime factorization of 42543 in exponential form is:

42543 = 3² × 29¹ × 163¹

Step-2: Prime Factorization of 42558

Prime factors of 42558 are 2, 3, 41, 173. Prime factorization of 42558 in exponential form is:

42558 = 2¹ × 3¹ × 41¹ × 173¹

Step-3: Factors of 42543

List of positive integer factors of 42543 that divides 42543 without a remainder.

1, 3, 9, 29, 87, 163, 261, 489, 1467, 4727, 14181

Step-4: Factors of 42558

List of positive integer factors of 42558 that divides 42543 without a remainder.

1, 2, 3, 6, 41, 82, 123, 173, 246, 346, 519, 1038, 7093, 14186, 21279

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42543 and 42558. The biggest common factor number is the GCF number.
So the greatest common factor 42543 and 42558 is 3.

Also check out the Least Common Multiple of 42543 and 42558