What is the Greatest Common Factor of 15781 and 15788?

Greatest common factor (GCF) of 15781 and 15788 is 1.

GCF(15781,15788) = 1

We will now calculate the prime factors of 15781 and 15788, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15781 and 15788.

How to find the GCF of 15781 and 15788?

We will first find the prime factorization of 15781 and 15788. After we will calculate the factors of 15781 and 15788 and find the biggest common factor number .

Step-1: Prime Factorization of 15781

Prime factors of 15781 are 43, 367. Prime factorization of 15781 in exponential form is:

15781 = 43¹ × 367¹

Step-2: Prime Factorization of 15788

Prime factors of 15788 are 2, 3947. Prime factorization of 15788 in exponential form is:

15788 = 2² × 3947¹

Step-3: Factors of 15781

List of positive integer factors of 15781 that divides 15781 without a remainder.

1, 43, 367

Step-4: Factors of 15788

List of positive integer factors of 15788 that divides 15781 without a remainder.

1, 2, 4, 3947, 7894

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15781 and 15788. The biggest common factor number is the GCF number.
So the greatest common factor 15781 and 15788 is 1.

Also check out the Least Common Multiple of 15781 and 15788