What is the Greatest Common Factor of 28780 and 28785?

Greatest common factor (GCF) of 28780 and 28785 is 5.

GCF(28780,28785) = 5

We will now calculate the prime factors of 28780 and 28785, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 28780 and 28785.

How to find the GCF of 28780 and 28785?

We will first find the prime factorization of 28780 and 28785. After we will calculate the factors of 28780 and 28785 and find the biggest common factor number .

Step-1: Prime Factorization of 28780

Prime factors of 28780 are 2, 5, 1439. Prime factorization of 28780 in exponential form is:

28780 = 2² × 5¹ × 1439¹

Step-2: 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-3: Factors of 28780

List of positive integer factors of 28780 that divides 28780 without a remainder.

1, 2, 4, 5, 10, 20, 1439, 2878, 5756, 7195, 14390

Step-4: Factors of 28785

List of positive integer factors of 28785 that divides 28780 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 28780 and 28785. The biggest common factor number is the GCF number.
So the greatest common factor 28780 and 28785 is 5.

Also check out the Least Common Multiple of 28780 and 28785