What is the Greatest Common Factor of 729 and 747?

Greatest common factor (GCF) of 729 and 747 is 9.

GCF(729,747) = 9

We will now calculate the prime factors of 729 and 747, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 729 and 747.

How to find the GCF of 729 and 747?

We will first find the prime factorization of 729 and 747. After we will calculate the factors of 729 and 747 and find the biggest common factor number .

Step-1: Prime Factorization of 729

Prime factors of 729 are 3. Prime factorization of 729 in exponential form is:

729 = 3⁶

Step-2: Prime Factorization of 747

Prime factors of 747 are 3, 83. Prime factorization of 747 in exponential form is:

747 = 3² × 83¹

Step-3: Factors of 729

List of positive integer factors of 729 that divides 729 without a remainder.

1, 3, 9, 27, 81, 243

Step-4: Factors of 747

List of positive integer factors of 747 that divides 729 without a remainder.

1, 3, 9, 83, 249

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 729 and 747. The biggest common factor number is the GCF number.
So the greatest common factor 729 and 747 is 9.

Also check out the Least Common Multiple of 729 and 747