What is the Greatest Common Factor of 28785 and 28791?

Greatest common factor (GCF) of 28785 and 28791 is 3.

GCF(28785,28791) = 3

We will now calculate the prime factors of 28785 and 28791, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 28785 and 28791.

How to find the GCF of 28785 and 28791?

We will first find the prime factorization of 28785 and 28791. After we will calculate the factors of 28785 and 28791 and find the biggest common factor number .

Step-1: Prime Factorization of 28785

Prime factors of 28785 are 3, 5, 19, 101. Prime factorization of 28785 in exponential form is:

28785 = 3¹ × 5¹ × 19¹ × 101¹

Step-2: Prime Factorization of 28791

Prime factors of 28791 are 3, 7, 457. Prime factorization of 28791 in exponential form is:

28791 = 3² × 7¹ × 457¹

Step-3: Factors of 28785

List of positive integer factors of 28785 that divides 28785 without a remainder.

1, 3, 5, 15, 19, 57, 95, 101, 285, 303, 505, 1515, 1919, 5757, 9595

Step-4: Factors of 28791

List of positive integer factors of 28791 that divides 28785 without a remainder.

1, 3, 7, 9, 21, 63, 457, 1371, 3199, 4113, 9597

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 28785 and 28791. The biggest common factor number is the GCF number.
So the greatest common factor 28785 and 28791 is 3.

Also check out the Least Common Multiple of 28785 and 28791