What is the Greatest Common Factor of 15897 and 15915?

Greatest common factor (GCF) of 15897 and 15915 is 3.

GCF(15897,15915) = 3

We will now calculate the prime factors of 15897 and 15915, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15897 and 15915.

How to find the GCF of 15897 and 15915?

We will first find the prime factorization of 15897 and 15915. After we will calculate the factors of 15897 and 15915 and find the biggest common factor number .

Step-1: Prime Factorization of 15897

Prime factors of 15897 are 3, 7, 757. Prime factorization of 15897 in exponential form is:

15897 = 3¹ × 7¹ × 757¹

Step-2: Prime Factorization of 15915

Prime factors of 15915 are 3, 5, 1061. Prime factorization of 15915 in exponential form is:

15915 = 3¹ × 5¹ × 1061¹

Step-3: Factors of 15897

List of positive integer factors of 15897 that divides 15897 without a remainder.

1, 3, 7, 21, 757, 2271, 5299

Step-4: Factors of 15915

List of positive integer factors of 15915 that divides 15897 without a remainder.

1, 3, 5, 15, 1061, 3183, 5305

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15897 and 15915. The biggest common factor number is the GCF number.
So the greatest common factor 15897 and 15915 is 3.

Also check out the Least Common Multiple of 15897 and 15915