What is the Greatest Common Factor of 65781 and 65790?

Greatest common factor (GCF) of 65781 and 65790 is 9.

GCF(65781,65790) = 9

We will now calculate the prime factors of 65781 and 65790, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 65781 and 65790.

How to find the GCF of 65781 and 65790?

We will first find the prime factorization of 65781 and 65790. After we will calculate the factors of 65781 and 65790 and find the biggest common factor number .

Step-1: Prime Factorization of 65781

Prime factors of 65781 are 3, 7309. Prime factorization of 65781 in exponential form is:

65781 = 3² × 7309¹

Step-2: Prime Factorization of 65790

Prime factors of 65790 are 2, 3, 5, 17, 43. Prime factorization of 65790 in exponential form is:

65790 = 2¹ × 3² × 5¹ × 17¹ × 43¹

Step-3: Factors of 65781

List of positive integer factors of 65781 that divides 65781 without a remainder.

1, 3, 9, 7309, 21927

Step-4: Factors of 65790

List of positive integer factors of 65790 that divides 65781 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 17, 18, 30, 34, 43, 45, 51, 85, 86, 90, 102, 129, 153, 170, 215, 255, 258, 306, 387, 430, 510, 645, 731, 765, 774, 1290, 1462, 1530, 1935, 2193, 3655, 3870, 4386, 6579, 7310, 10965, 13158, 21930, 32895

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 65781 and 65790. The biggest common factor number is the GCF number.
So the greatest common factor 65781 and 65790 is 9.

Also check out the Least Common Multiple of 65781 and 65790