What is the Greatest Common Factor of 28189 and 28203?

Greatest common factor (GCF) of 28189 and 28203 is 7.

GCF(28189,28203) = 7

We will now calculate the prime factors of 28189 and 28203, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 28189 and 28203.

How to find the GCF of 28189 and 28203?

We will first find the prime factorization of 28189 and 28203. After we will calculate the factors of 28189 and 28203 and find the biggest common factor number .

Step-1: Prime Factorization of 28189

Prime factors of 28189 are 7, 4027. Prime factorization of 28189 in exponential form is:

28189 = 7¹ × 4027¹

Step-2: Prime Factorization of 28203

Prime factors of 28203 are 3, 7, 17, 79. Prime factorization of 28203 in exponential form is:

28203 = 3¹ × 7¹ × 17¹ × 79¹

Step-3: Factors of 28189

List of positive integer factors of 28189 that divides 28189 without a remainder.

1, 7, 4027

Step-4: Factors of 28203

List of positive integer factors of 28203 that divides 28189 without a remainder.

1, 3, 7, 17, 21, 51, 79, 119, 237, 357, 553, 1343, 1659, 4029, 9401

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 28189 and 28203. The biggest common factor number is the GCF number.
So the greatest common factor 28189 and 28203 is 7.

Also check out the Least Common Multiple of 28189 and 28203