What is the Greatest Common Factor of 67221 and 67239?

Greatest common factor (GCF) of 67221 and 67239 is 9.

GCF(67221,67239) = 9

We will now calculate the prime factors of 67221 and 67239, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 67221 and 67239.

How to find the GCF of 67221 and 67239?

We will first find the prime factorization of 67221 and 67239. After we will calculate the factors of 67221 and 67239 and find the biggest common factor number .

Step-1: Prime Factorization of 67221

Prime factors of 67221 are 3, 7, 11, 97. Prime factorization of 67221 in exponential form is:

67221 = 3² × 7¹ × 11¹ × 97¹

Step-2: Prime Factorization of 67239

Prime factors of 67239 are 3, 31, 241. Prime factorization of 67239 in exponential form is:

67239 = 3² × 31¹ × 241¹

Step-3: Factors of 67221

List of positive integer factors of 67221 that divides 67221 without a remainder.

1, 3, 7, 9, 11, 21, 33, 63, 77, 97, 99, 231, 291, 679, 693, 873, 1067, 2037, 3201, 6111, 7469, 9603, 22407

Step-4: Factors of 67239

List of positive integer factors of 67239 that divides 67221 without a remainder.

1, 3, 9, 31, 93, 241, 279, 723, 2169, 7471, 22413

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 67221 and 67239. The biggest common factor number is the GCF number.
So the greatest common factor 67221 and 67239 is 9.

Also check out the Least Common Multiple of 67221 and 67239