What is the Greatest Common Factor of 2415 and 2421?

Greatest common factor (GCF) of 2415 and 2421 is 3.

GCF(2415,2421) = 3

We will now calculate the prime factors of 2415 and 2421, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2415 and 2421.

How to find the GCF of 2415 and 2421?

We will first find the prime factorization of 2415 and 2421. After we will calculate the factors of 2415 and 2421 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 2421

Prime factors of 2421 are 3, 269. Prime factorization of 2421 in exponential form is:

2421 = 3² × 269¹

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 2421

List of positive integer factors of 2421 that divides 2415 without a remainder.

1, 3, 9, 269, 807

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2415 and 2421. The biggest common factor number is the GCF number.
So the greatest common factor 2415 and 2421 is 3.

Also check out the Least Common Multiple of 2415 and 2421