What is the Greatest Common Factor of 228 and 247?

Greatest common factor (GCF) of 228 and 247 is 19.

GCF(228,247) = 19

We will now calculate the prime factors of 228 and 247, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 228 and 247.

How to find the GCF of 228 and 247?

We will first find the prime factorization of 228 and 247. After we will calculate the factors of 228 and 247 and find the biggest common factor number .

Step-1: Prime Factorization of 228

Prime factors of 228 are 2, 3, 19. Prime factorization of 228 in exponential form is:

228 = 2² × 3¹ × 19¹

Step-2: Prime Factorization of 247

Prime factors of 247 are 13, 19. Prime factorization of 247 in exponential form is:

247 = 13¹ × 19¹

Step-3: Factors of 228

List of positive integer factors of 228 that divides 228 without a remainder.

1, 2, 3, 4, 6, 12, 19, 38, 57, 76, 114

Step-4: Factors of 247

List of positive integer factors of 247 that divides 228 without a remainder.

1, 13, 19

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 228 and 247. The biggest common factor number is the GCF number.
So the greatest common factor 228 and 247 is 19.

Also check out the Least Common Multiple of 228 and 247