What is the Greatest Common Factor of 2440 and 2455?

Greatest common factor (GCF) of 2440 and 2455 is 5.

GCF(2440,2455) = 5

We will now calculate the prime factors of 2440 and 2455, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2440 and 2455.

How to find the GCF of 2440 and 2455?

We will first find the prime factorization of 2440 and 2455. After we will calculate the factors of 2440 and 2455 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 2455

Prime factors of 2455 are 5, 491. Prime factorization of 2455 in exponential form is:

2455 = 5¹ × 491¹

Step-3: Factors of 2440

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

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

Step-4: Factors of 2455

List of positive integer factors of 2455 that divides 2440 without a remainder.

1, 5, 491

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2440 and 2455. The biggest common factor number is the GCF number.
So the greatest common factor 2440 and 2455 is 5.

Also check out the Least Common Multiple of 2440 and 2455