What is the Greatest Common Factor of 18721 and 18729?

Greatest common factor (GCF) of 18721 and 18729 is 1.

GCF(18721,18729) = 1

We will now calculate the prime factors of 18721 and 18729, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18721 and 18729.

How to find the GCF of 18721 and 18729?

We will first find the prime factorization of 18721 and 18729. After we will calculate the factors of 18721 and 18729 and find the biggest common factor number .

Step-1: Prime Factorization of 18721

Prime factors of 18721 are 97, 193. Prime factorization of 18721 in exponential form is:

18721 = 97¹ × 193¹

Step-2: Prime Factorization of 18729

Prime factors of 18729 are 3, 2081. Prime factorization of 18729 in exponential form is:

18729 = 3² × 2081¹

Step-3: Factors of 18721

List of positive integer factors of 18721 that divides 18721 without a remainder.

1, 97, 193

Step-4: Factors of 18729

List of positive integer factors of 18729 that divides 18721 without a remainder.

1, 3, 9, 2081, 6243

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18721 and 18729. The biggest common factor number is the GCF number.
So the greatest common factor 18721 and 18729 is 1.

Also check out the Least Common Multiple of 18721 and 18729