What is the Greatest Common Factor of 16805 and 16821?

Greatest common factor (GCF) of 16805 and 16821 is 1.

GCF(16805,16821) = 1

We will now calculate the prime factors of 16805 and 16821, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 16805 and 16821.

How to find the GCF of 16805 and 16821?

We will first find the prime factorization of 16805 and 16821. After we will calculate the factors of 16805 and 16821 and find the biggest common factor number .

Step-1: Prime Factorization of 16805

Prime factors of 16805 are 5, 3361. Prime factorization of 16805 in exponential form is:

16805 = 5¹ × 3361¹

Step-2: Prime Factorization of 16821

Prime factors of 16821 are 3, 7, 89. Prime factorization of 16821 in exponential form is:

16821 = 3³ × 7¹ × 89¹

Step-3: Factors of 16805

List of positive integer factors of 16805 that divides 16805 without a remainder.

1, 5, 3361

Step-4: Factors of 16821

List of positive integer factors of 16821 that divides 16805 without a remainder.

1, 3, 7, 9, 21, 27, 63, 89, 189, 267, 623, 801, 1869, 2403, 5607

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 16805 and 16821. The biggest common factor number is the GCF number.
So the greatest common factor 16805 and 16821 is 1.

Also check out the Least Common Multiple of 16805 and 16821