What is the Greatest Common Factor of 2815 and 2820?

Greatest common factor (GCF) of 2815 and 2820 is 5.

GCF(2815,2820) = 5

We will now calculate the prime factors of 2815 and 2820, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2815 and 2820.

How to find the GCF of 2815 and 2820?

We will first find the prime factorization of 2815 and 2820. After we will calculate the factors of 2815 and 2820 and find the biggest common factor number .

Step-1: Prime Factorization of 2815

Prime factors of 2815 are 5, 563. Prime factorization of 2815 in exponential form is:

2815 = 5¹ × 563¹

Step-2: Prime Factorization of 2820

Prime factors of 2820 are 2, 3, 5, 47. Prime factorization of 2820 in exponential form is:

2820 = 2² × 3¹ × 5¹ × 47¹

Step-3: Factors of 2815

List of positive integer factors of 2815 that divides 2815 without a remainder.

1, 5, 563

Step-4: Factors of 2820

List of positive integer factors of 2820 that divides 2815 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 47, 60, 94, 141, 188, 235, 282, 470, 564, 705, 940, 1410

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2815 and 2820. The biggest common factor number is the GCF number.
So the greatest common factor 2815 and 2820 is 5.

Also check out the Least Common Multiple of 2815 and 2820