What is the Greatest Common Factor of 18780 and 18785?

Greatest common factor (GCF) of 18780 and 18785 is 5.

GCF(18780,18785) = 5

We will now calculate the prime factors of 18780 and 18785, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18780 and 18785.

How to find the GCF of 18780 and 18785?

We will first find the prime factorization of 18780 and 18785. After we will calculate the factors of 18780 and 18785 and find the biggest common factor number .

Step-1: Prime Factorization of 18780

Prime factors of 18780 are 2, 3, 5, 313. Prime factorization of 18780 in exponential form is:

18780 = 2² × 3¹ × 5¹ × 313¹

Step-2: Prime Factorization of 18785

Prime factors of 18785 are 5, 13, 17. Prime factorization of 18785 in exponential form is:

18785 = 5¹ × 13¹ × 17²

Step-3: Factors of 18780

List of positive integer factors of 18780 that divides 18780 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 313, 626, 939, 1252, 1565, 1878, 3130, 3756, 4695, 6260, 9390

Step-4: Factors of 18785

List of positive integer factors of 18785 that divides 18780 without a remainder.

1, 5, 13, 17, 65, 85, 221, 289, 1105, 1445, 3757

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18780 and 18785. The biggest common factor number is the GCF number.
So the greatest common factor 18780 and 18785 is 5.

Also check out the Least Common Multiple of 18780 and 18785