What is the Greatest Common Factor of 28305 and 28309?

Greatest common factor (GCF) of 28305 and 28309 is 1.

GCF(28305,28309) = 1

We will now calculate the prime factors of 28305 and 28309, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 28305 and 28309.

How to find the GCF of 28305 and 28309?

We will first find the prime factorization of 28305 and 28309. After we will calculate the factors of 28305 and 28309 and find the biggest common factor number .

Step-1: Prime Factorization of 28305

Prime factors of 28305 are 3, 5, 17, 37. Prime factorization of 28305 in exponential form is:

28305 = 3² × 5¹ × 17¹ × 37¹

Step-2: Prime Factorization of 28309

Prime factors of 28309 are 28309. Prime factorization of 28309 in exponential form is:

28309 = 28309¹

Step-3: Factors of 28305

List of positive integer factors of 28305 that divides 28305 without a remainder.

1, 3, 5, 9, 15, 17, 37, 45, 51, 85, 111, 153, 185, 255, 333, 555, 629, 765, 1665, 1887, 3145, 5661, 9435

Step-4: Factors of 28309

List of positive integer factors of 28309 that divides 28305 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 28305 and 28309. The biggest common factor number is the GCF number.
So the greatest common factor 28305 and 28309 is 1.

Also check out the Least Common Multiple of 28305 and 28309