What is the Greatest Common Factor of 261 and 266?

Greatest common factor (GCF) of 261 and 266 is 1.

GCF(261,266) = 1

We will now calculate the prime factors of 261 and 266, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 261 and 266.

How to find the GCF of 261 and 266?

We will first find the prime factorization of 261 and 266. After we will calculate the factors of 261 and 266 and find the biggest common factor number .

Step-1: Prime Factorization of 261

Prime factors of 261 are 3, 29. Prime factorization of 261 in exponential form is:

261 = 3² × 29¹

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 261

List of positive integer factors of 261 that divides 261 without a remainder.

1, 3, 9, 29, 87

Step-4: Factors of 266

List of positive integer factors of 266 that divides 261 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 261 and 266. The biggest common factor number is the GCF number.
So the greatest common factor 261 and 266 is 1.

Also check out the Least Common Multiple of 261 and 266