What is the Greatest Common Factor of 28185 and 28191?

Greatest common factor (GCF) of 28185 and 28191 is 3.

GCF(28185,28191) = 3

We will now calculate the prime factors of 28185 and 28191, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 28185 and 28191.

How to find the GCF of 28185 and 28191?

We will first find the prime factorization of 28185 and 28191. After we will calculate the factors of 28185 and 28191 and find the biggest common factor number .

Step-1: Prime Factorization of 28185

Prime factors of 28185 are 3, 5, 1879. Prime factorization of 28185 in exponential form is:

28185 = 3¹ × 5¹ × 1879¹

Step-2: Prime Factorization of 28191

Prime factors of 28191 are 3, 9397. Prime factorization of 28191 in exponential form is:

28191 = 3¹ × 9397¹

Step-3: Factors of 28185

List of positive integer factors of 28185 that divides 28185 without a remainder.

1, 3, 5, 15, 1879, 5637, 9395

Step-4: Factors of 28191

List of positive integer factors of 28191 that divides 28185 without a remainder.

1, 3, 9397

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 28185 and 28191. The biggest common factor number is the GCF number.
So the greatest common factor 28185 and 28191 is 3.

Also check out the Least Common Multiple of 28185 and 28191