What is the Greatest Common Factor of 2440 and 2445?

Greatest common factor (GCF) of 2440 and 2445 is 5.

GCF(2440,2445) = 5

We will now calculate the prime factors of 2440 and 2445, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2440 and 2445.

How to find the GCF of 2440 and 2445?

We will first find the prime factorization of 2440 and 2445. After we will calculate the factors of 2440 and 2445 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 2445

Prime factors of 2445 are 3, 5, 163. Prime factorization of 2445 in exponential form is:

2445 = 3¹ × 5¹ × 163¹

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 2445

List of positive integer factors of 2445 that divides 2440 without a remainder.

1, 3, 5, 15, 163, 489, 815

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2440 and 2445. The biggest common factor number is the GCF number.
So the greatest common factor 2440 and 2445 is 5.

Also check out the Least Common Multiple of 2440 and 2445