What is the Greatest Common Factor of 68391 and 68409?

Greatest common factor (GCF) of 68391 and 68409 is 9.

GCF(68391,68409) = 9

We will now calculate the prime factors of 68391 and 68409, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 68391 and 68409.

How to find the GCF of 68391 and 68409?

We will first find the prime factorization of 68391 and 68409. After we will calculate the factors of 68391 and 68409 and find the biggest common factor number .

Step-1: Prime Factorization of 68391

Prime factors of 68391 are 3, 17, 149. Prime factorization of 68391 in exponential form is:

68391 = 3³ × 17¹ × 149¹

Step-2: Prime Factorization of 68409

Prime factors of 68409 are 3, 11, 691. Prime factorization of 68409 in exponential form is:

68409 = 3² × 11¹ × 691¹

Step-3: Factors of 68391

List of positive integer factors of 68391 that divides 68391 without a remainder.

1, 3, 9, 17, 27, 51, 149, 153, 447, 459, 1341, 2533, 4023, 7599, 22797

Step-4: Factors of 68409

List of positive integer factors of 68409 that divides 68391 without a remainder.

1, 3, 9, 11, 33, 99, 691, 2073, 6219, 7601, 22803

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 68391 and 68409. The biggest common factor number is the GCF number.
So the greatest common factor 68391 and 68409 is 9.

Also check out the Least Common Multiple of 68391 and 68409