What is the Greatest Common Factor of 18815 and 18820?

Greatest common factor (GCF) of 18815 and 18820 is 5.

GCF(18815,18820) = 5

We will now calculate the prime factors of 18815 and 18820, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18815 and 18820.

How to find the GCF of 18815 and 18820?

We will first find the prime factorization of 18815 and 18820. After we will calculate the factors of 18815 and 18820 and find the biggest common factor number .

Step-1: Prime Factorization of 18815

Prime factors of 18815 are 5, 53, 71. Prime factorization of 18815 in exponential form is:

18815 = 5¹ × 53¹ × 71¹

Step-2: Prime Factorization of 18820

Prime factors of 18820 are 2, 5, 941. Prime factorization of 18820 in exponential form is:

18820 = 2² × 5¹ × 941¹

Step-3: Factors of 18815

List of positive integer factors of 18815 that divides 18815 without a remainder.

1, 5, 53, 71, 265, 355, 3763

Step-4: Factors of 18820

List of positive integer factors of 18820 that divides 18815 without a remainder.

1, 2, 4, 5, 10, 20, 941, 1882, 3764, 4705, 9410

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18815 and 18820. The biggest common factor number is the GCF number.
So the greatest common factor 18815 and 18820 is 5.

Also check out the Least Common Multiple of 18815 and 18820