What is the Greatest Common Factor of 15816 and 15821?

Greatest common factor (GCF) of 15816 and 15821 is 1.

GCF(15816,15821) = 1

We will now calculate the prime factors of 15816 and 15821, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15816 and 15821.

How to find the GCF of 15816 and 15821?

We will first find the prime factorization of 15816 and 15821. After we will calculate the factors of 15816 and 15821 and find the biggest common factor number .

Step-1: Prime Factorization of 15816

Prime factors of 15816 are 2, 3, 659. Prime factorization of 15816 in exponential form is:

15816 = 2³ × 3¹ × 659¹

Step-2: Prime Factorization of 15821

Prime factors of 15821 are 13, 1217. Prime factorization of 15821 in exponential form is:

15821 = 13¹ × 1217¹

Step-3: Factors of 15816

List of positive integer factors of 15816 that divides 15816 without a remainder.

1, 2, 3, 4, 6, 8, 12, 24, 659, 1318, 1977, 2636, 3954, 5272, 7908

Step-4: Factors of 15821

List of positive integer factors of 15821 that divides 15816 without a remainder.

1, 13, 1217

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15816 and 15821. The biggest common factor number is the GCF number.
So the greatest common factor 15816 and 15821 is 1.

Also check out the Least Common Multiple of 15816 and 15821