What is the Greatest Common Factor of 42543 and 42549?

Greatest common factor (GCF) of 42543 and 42549 is 3.

GCF(42543,42549) = 3

We will now calculate the prime factors of 42543 and 42549, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42543 and 42549.

How to find the GCF of 42543 and 42549?

We will first find the prime factorization of 42543 and 42549. After we will calculate the factors of 42543 and 42549 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 42549

Prime factors of 42549 are 3, 13, 1091. Prime factorization of 42549 in exponential form is:

42549 = 3¹ × 13¹ × 1091¹

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 42549

List of positive integer factors of 42549 that divides 42543 without a remainder.

1, 3, 13, 39, 1091, 3273, 14183

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42543 and 42549. The biggest common factor number is the GCF number.
So the greatest common factor 42543 and 42549 is 3.

Also check out the Least Common Multiple of 42543 and 42549