What is the Greatest Common Factor of 266 and 285?

Greatest common factor (GCF) of 266 and 285 is 19.

GCF(266,285) = 19

We will now calculate the prime factors of 266 and 285, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 266 and 285.

How to find the GCF of 266 and 285?

We will first find the prime factorization of 266 and 285. After we will calculate the factors of 266 and 285 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 285

Prime factors of 285 are 3, 5, 19. Prime factorization of 285 in exponential form is:

285 = 3¹ × 5¹ × 19¹

Step-3: Factors of 266

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

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

Step-4: Factors of 285

List of positive integer factors of 285 that divides 266 without a remainder.

1, 3, 5, 15, 19, 57, 95

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 266 and 285. The biggest common factor number is the GCF number.
So the greatest common factor 266 and 285 is 19.

Also check out the Least Common Multiple of 266 and 285