What is the Greatest Common Factor of 247 and 266?

Greatest common factor (GCF) of 247 and 266 is 19.

GCF(247,266) = 19

We will now calculate the prime factors of 247 and 266, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 247 and 266.

How to find the GCF of 247 and 266?

We will first find the prime factorization of 247 and 266. After we will calculate the factors of 247 and 266 and find the biggest common factor number .

Step-1: Prime Factorization of 247

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

247 = 13¹ × 19¹

Step-2: Prime Factorization of 266

Prime factors of 266 are 2, 7, 19. Prime factorization of 266 in exponential form is:

266 = 2¹ × 7¹ × 19¹

Step-3: Factors of 247

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

1, 13, 19

Step-4: Factors of 266

List of positive integer factors of 266 that divides 247 without a remainder.

1, 2, 7, 14, 19, 38, 133

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 247 and 266. The biggest common factor number is the GCF number.
So the greatest common factor 247 and 266 is 19.

Also check out the Least Common Multiple of 247 and 266