What is the Greatest Common Factor of 18711 and 18721?

Greatest common factor (GCF) of 18711 and 18721 is 1.

GCF(18711,18721) = 1

We will now calculate the prime factors of 18711 and 18721, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18711 and 18721.

How to find the GCF of 18711 and 18721?

We will first find the prime factorization of 18711 and 18721. After we will calculate the factors of 18711 and 18721 and find the biggest common factor number .

Step-1: Prime Factorization of 18711

Prime factors of 18711 are 3, 7, 11. Prime factorization of 18711 in exponential form is:

18711 = 3⁵ × 7¹ × 11¹

Step-2: Prime Factorization of 18721

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

18721 = 97¹ × 193¹

Step-3: Factors of 18711

List of positive integer factors of 18711 that divides 18711 without a remainder.

1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 81, 99, 189, 231, 243, 297, 567, 693, 891, 1701, 2079, 2673, 6237

Step-4: Factors of 18721

List of positive integer factors of 18721 that divides 18711 without a remainder.

1, 97, 193

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18711 and 18721. The biggest common factor number is the GCF number.
So the greatest common factor 18711 and 18721 is 1.

Also check out the Least Common Multiple of 18711 and 18721