What is the Greatest Common Factor of 774 and 789?

Greatest common factor (GCF) of 774 and 789 is 3.

GCF(774,789) = 3

We will now calculate the prime factors of 774 and 789, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 774 and 789.

How to find the GCF of 774 and 789?

We will first find the prime factorization of 774 and 789. After we will calculate the factors of 774 and 789 and find the biggest common factor number .

Step-1: Prime Factorization of 774

Prime factors of 774 are 2, 3, 43. Prime factorization of 774 in exponential form is:

774 = 2¹ × 3² × 43¹

Step-2: Prime Factorization of 789

Prime factors of 789 are 3, 263. Prime factorization of 789 in exponential form is:

789 = 3¹ × 263¹

Step-3: Factors of 774

List of positive integer factors of 774 that divides 774 without a remainder.

1, 2, 3, 6, 9, 18, 43, 86, 129, 258, 387

Step-4: Factors of 789

List of positive integer factors of 789 that divides 774 without a remainder.

1, 3, 263

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 774 and 789. The biggest common factor number is the GCF number.
So the greatest common factor 774 and 789 is 3.

Also check out the Least Common Multiple of 774 and 789