What is the Greatest Common Factor of 15855 and 15868?

Greatest common factor (GCF) of 15855 and 15868 is 1.

GCF(15855,15868) = 1

We will now calculate the prime factors of 15855 and 15868, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15855 and 15868.

How to find the GCF of 15855 and 15868?

We will first find the prime factorization of 15855 and 15868. After we will calculate the factors of 15855 and 15868 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 15868

Prime factors of 15868 are 2, 3967. Prime factorization of 15868 in exponential form is:

15868 = 2² × 3967¹

Step-3: Factors of 15855

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

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

Step-4: Factors of 15868

List of positive integer factors of 15868 that divides 15855 without a remainder.

1, 2, 4, 3967, 7934

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15855 and 15868. The biggest common factor number is the GCF number.
So the greatest common factor 15855 and 15868 is 1.

Also check out the Least Common Multiple of 15855 and 15868