What is the Greatest Common Factor of 2420 and 2440?

Greatest common factor (GCF) of 2420 and 2440 is 20.

GCF(2420,2440) = 20

We will now calculate the prime factors of 2420 and 2440, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2420 and 2440.

How to find the GCF of 2420 and 2440?

We will first find the prime factorization of 2420 and 2440. After we will calculate the factors of 2420 and 2440 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 2440

Prime factors of 2440 are 2, 5, 61. Prime factorization of 2440 in exponential form is:

2440 = 2³ × 5¹ × 61¹

Step-3: Factors of 2420

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

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

Step-4: Factors of 2440

List of positive integer factors of 2440 that divides 2420 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2420 and 2440. The biggest common factor number is the GCF number.
So the greatest common factor 2420 and 2440 is 20.

Also check out the Least Common Multiple of 2420 and 2440