What is the Greatest Common Factor of 18221 and 18225?

Greatest common factor (GCF) of 18221 and 18225 is 1.

GCF(18221,18225) = 1

We will now calculate the prime factors of 18221 and 18225, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18221 and 18225.

How to find the GCF of 18221 and 18225?

We will first find the prime factorization of 18221 and 18225. After we will calculate the factors of 18221 and 18225 and find the biggest common factor number .

Step-1: Prime Factorization of 18221

Prime factors of 18221 are 7, 19, 137. Prime factorization of 18221 in exponential form is:

18221 = 7¹ × 19¹ × 137¹

Step-2: Prime Factorization of 18225

Prime factors of 18225 are 3, 5. Prime factorization of 18225 in exponential form is:

18225 = 3⁶ × 5²

Step-3: Factors of 18221

List of positive integer factors of 18221 that divides 18221 without a remainder.

1, 7, 19, 133, 137, 959, 2603

Step-4: Factors of 18225

List of positive integer factors of 18225 that divides 18221 without a remainder.

1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 243, 405, 675, 729, 1215, 2025, 3645, 6075

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18221 and 18225. The biggest common factor number is the GCF number.
So the greatest common factor 18221 and 18225 is 1.

Also check out the Least Common Multiple of 18221 and 18225