What is the Greatest Common Factor of 42309 and 42321?

Greatest common factor (GCF) of 42309 and 42321 is 3.

GCF(42309,42321) = 3

We will now calculate the prime factors of 42309 and 42321, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42309 and 42321.

How to find the GCF of 42309 and 42321?

We will first find the prime factorization of 42309 and 42321. After we will calculate the factors of 42309 and 42321 and find the biggest common factor number .

Step-1: Prime Factorization of 42309

Prime factors of 42309 are 3, 1567. Prime factorization of 42309 in exponential form is:

42309 = 3³ × 1567¹

Step-2: Prime Factorization of 42321

Prime factors of 42321 are 3, 14107. Prime factorization of 42321 in exponential form is:

42321 = 3¹ × 14107¹

Step-3: Factors of 42309

List of positive integer factors of 42309 that divides 42309 without a remainder.

1, 3, 9, 27, 1567, 4701, 14103

Step-4: Factors of 42321

List of positive integer factors of 42321 that divides 42309 without a remainder.

1, 3, 14107

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42309 and 42321. The biggest common factor number is the GCF number.
So the greatest common factor 42309 and 42321 is 3.

Also check out the Least Common Multiple of 42309 and 42321