What is the Greatest Common Factor of 18840 and 18855?

Greatest common factor (GCF) of 18840 and 18855 is 15.

GCF(18840,18855) = 15

We will now calculate the prime factors of 18840 and 18855, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18840 and 18855.

How to find the GCF of 18840 and 18855?

We will first find the prime factorization of 18840 and 18855. After we will calculate the factors of 18840 and 18855 and find the biggest common factor number .

Step-1: Prime Factorization of 18840

Prime factors of 18840 are 2, 3, 5, 157. Prime factorization of 18840 in exponential form is:

18840 = 2³ × 3¹ × 5¹ × 157¹

Step-2: Prime Factorization of 18855

Prime factors of 18855 are 3, 5, 419. Prime factorization of 18855 in exponential form is:

18855 = 3² × 5¹ × 419¹

Step-3: Factors of 18840

List of positive integer factors of 18840 that divides 18840 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 157, 314, 471, 628, 785, 942, 1256, 1570, 1884, 2355, 3140, 3768, 4710, 6280, 9420

Step-4: Factors of 18855

List of positive integer factors of 18855 that divides 18840 without a remainder.

1, 3, 5, 9, 15, 45, 419, 1257, 2095, 3771, 6285

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18840 and 18855. The biggest common factor number is the GCF number.
So the greatest common factor 18840 and 18855 is 15.

Also check out the Least Common Multiple of 18840 and 18855