What is the Greatest Common Factor of 15851 and 15855?

Greatest common factor (GCF) of 15851 and 15855 is 1.

GCF(15851,15855) = 1

We will now calculate the prime factors of 15851 and 15855, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15851 and 15855.

How to find the GCF of 15851 and 15855?

We will first find the prime factorization of 15851 and 15855. After we will calculate the factors of 15851 and 15855 and find the biggest common factor number .

Step-1: Prime Factorization of 15851

Prime factors of 15851 are 11, 131. Prime factorization of 15851 in exponential form is:

15851 = 11² × 131¹

Step-2: Prime Factorization of 15855

Prime factors of 15855 are 3, 5, 7, 151. Prime factorization of 15855 in exponential form is:

15855 = 3¹ × 5¹ × 7¹ × 151¹

Step-3: Factors of 15851

List of positive integer factors of 15851 that divides 15851 without a remainder.

1, 11, 121, 131, 1441

Step-4: Factors of 15855

List of positive integer factors of 15855 that divides 15851 without a remainder.

1, 3, 5, 7, 15, 21, 35, 105, 151, 453, 755, 1057, 2265, 3171, 5285

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15851 and 15855. The biggest common factor number is the GCF number.
So the greatest common factor 15851 and 15855 is 1.

Also check out the Least Common Multiple of 15851 and 15855