What is the Greatest Common Factor of 66521 and 66538?

Greatest common factor (GCF) of 66521 and 66538 is 17.

GCF(66521,66538) = 17

We will now calculate the prime factors of 66521 and 66538, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 66521 and 66538.

How to find the GCF of 66521 and 66538?

We will first find the prime factorization of 66521 and 66538. After we will calculate the factors of 66521 and 66538 and find the biggest common factor number .

Step-1: Prime Factorization of 66521

Prime factors of 66521 are 7, 13, 17, 43. Prime factorization of 66521 in exponential form is:

66521 = 7¹ × 13¹ × 17¹ × 43¹

Step-2: Prime Factorization of 66538

Prime factors of 66538 are 2, 17, 19, 103. Prime factorization of 66538 in exponential form is:

66538 = 2¹ × 17¹ × 19¹ × 103¹

Step-3: Factors of 66521

List of positive integer factors of 66521 that divides 66521 without a remainder.

1, 7, 13, 17, 43, 91, 119, 221, 301, 559, 731, 1547, 3913, 5117, 9503

Step-4: Factors of 66538

List of positive integer factors of 66538 that divides 66521 without a remainder.

1, 2, 17, 19, 34, 38, 103, 206, 323, 646, 1751, 1957, 3502, 3914, 33269

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 66521 and 66538. The biggest common factor number is the GCF number.
So the greatest common factor 66521 and 66538 is 17.

Also check out the Least Common Multiple of 66521 and 66538