What is the Greatest Common Factor of 15405 and 15421?

Greatest common factor (GCF) of 15405 and 15421 is 1.

GCF(15405,15421) = 1

We will now calculate the prime factors of 15405 and 15421, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15405 and 15421.

How to find the GCF of 15405 and 15421?

We will first find the prime factorization of 15405 and 15421. After we will calculate the factors of 15405 and 15421 and find the biggest common factor number .

Step-1: Prime Factorization of 15405

Prime factors of 15405 are 3, 5, 13, 79. Prime factorization of 15405 in exponential form is:

15405 = 3¹ × 5¹ × 13¹ × 79¹

Step-2: Prime Factorization of 15421

Prime factors of 15421 are 7, 2203. Prime factorization of 15421 in exponential form is:

15421 = 7¹ × 2203¹

Step-3: Factors of 15405

List of positive integer factors of 15405 that divides 15405 without a remainder.

1, 3, 5, 13, 15, 39, 65, 79, 195, 237, 395, 1027, 1185, 3081, 5135

Step-4: Factors of 15421

List of positive integer factors of 15421 that divides 15405 without a remainder.

1, 7, 2203

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15405 and 15421. The biggest common factor number is the GCF number.
So the greatest common factor 15405 and 15421 is 1.

Also check out the Least Common Multiple of 15405 and 15421