What is the Greatest Common Factor of 2415 and 2420?

Greatest common factor (GCF) of 2415 and 2420 is 5.

GCF(2415,2420) = 5

We will now calculate the prime factors of 2415 and 2420, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2415 and 2420.

How to find the GCF of 2415 and 2420?

We will first find the prime factorization of 2415 and 2420. After we will calculate the factors of 2415 and 2420 and find the biggest common factor number .

Step-1: Prime Factorization of 2415

Prime factors of 2415 are 3, 5, 7, 23. Prime factorization of 2415 in exponential form is:

2415 = 3¹ × 5¹ × 7¹ × 23¹

Step-2: Prime Factorization of 2420

Prime factors of 2420 are 2, 5, 11. Prime factorization of 2420 in exponential form is:

2420 = 2² × 5¹ × 11²

Step-3: Factors of 2415

List of positive integer factors of 2415 that divides 2415 without a remainder.

1, 3, 5, 7, 15, 21, 23, 35, 69, 105, 115, 161, 345, 483, 805

Step-4: Factors of 2420

List of positive integer factors of 2420 that divides 2415 without a remainder.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2415 and 2420. The biggest common factor number is the GCF number.
So the greatest common factor 2415 and 2420 is 5.

Also check out the Least Common Multiple of 2415 and 2420