What is the Greatest Common Factor of 17420 and 17440?

Greatest common factor (GCF) of 17420 and 17440 is 20.

GCF(17420,17440) = 20

We will now calculate the prime factors of 17420 and 17440, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 17420 and 17440.

How to find the GCF of 17420 and 17440?

We will first find the prime factorization of 17420 and 17440. After we will calculate the factors of 17420 and 17440 and find the biggest common factor number .

Step-1: Prime Factorization of 17420

Prime factors of 17420 are 2, 5, 13, 67. Prime factorization of 17420 in exponential form is:

17420 = 2² × 5¹ × 13¹ × 67¹

Step-2: Prime Factorization of 17440

Prime factors of 17440 are 2, 5, 109. Prime factorization of 17440 in exponential form is:

17440 = 2⁵ × 5¹ × 109¹

Step-3: Factors of 17420

List of positive integer factors of 17420 that divides 17420 without a remainder.

1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 130, 134, 260, 268, 335, 670, 871, 1340, 1742, 3484, 4355, 8710

Step-4: Factors of 17440

List of positive integer factors of 17440 that divides 17420 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1744, 2180, 3488, 4360, 8720

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 17420 and 17440. The biggest common factor number is the GCF number.
So the greatest common factor 17420 and 17440 is 20.

Also check out the Least Common Multiple of 17420 and 17440