GCD of 809, 644, 79, 243 Calculator

Given Input numbers are 809, 644, 79, 243

To find the GCD of numbers using factoring list out all the divisors of each number

Divisors of 809

List of positive integer divisors of 809 that divides 809 without a remainder.

1, 809

Divisors of 644

List of positive integer divisors of 644 that divides 644 without a remainder.

1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644

Divisors of 79

List of positive integer divisors of 79 that divides 79 without a remainder.

1, 79

Divisors of 243

List of positive integer divisors of 243 that divides 243 without a remainder.

1, 3, 9, 27, 81, 243

Greatest Common Divisior

We found the divisors of 809, 644, 79, 243 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 809, 644, 79, 243 is 1.

Therefore, GCD of numbers 809, 644, 79, 243 is 1

Given Input Data is 809, 644, 79, 243

Make a list of Prime Factors of all the given numbers initially

Prime Factorization of 809 is 809

Prime Factorization of 644 is 2 x 2 x 7 x 23

Prime Factorization of 79 is 79

Prime Factorization of 243 is 3 x 3 x 3 x 3 x 3

The above numbers do not have any common prime factor. So GCD is 1

Step1:

Let's calculate the GCD of first two numbers

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(809, 644) = 520996

GCD(809, 644) = ( 809 x 644 ) / 520996

GCD(809, 644) = 520996 / 520996

GCD(809, 644) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 79

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(1, 79) = 79

GCD(1, 79) = ( 1 x 79 ) / 79

GCD(1, 79) = 79 / 79

GCD(1, 79) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 243

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(1, 243) = 243

GCD(1, 243) = ( 1 x 243 ) / 243

GCD(1, 243) = 243 / 243

GCD(1, 243) = 1

GCD of 809, 644, 79, 243 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 510, 227, 73, 117
• GCD of 200, 491, 38, 321
• GCD of 973, 843, 28, 851
• GCD of 743, 110, 31, 883
• GCD of 935, 861, 98, 166

1. What is the GCD of 809, 644, 79, 243?

GCD of 809, 644, 79, 243 is 1

2. Where do I get the detailed procedure to find GCD of 809, 644, 79, 243?

You can find a detailed procedure to find GCD of 809, 644, 79, 243 on our page.

3. How to find GCD of 809, 644, 79, 243 on a calculator?

You can find the GCD of 809, 644, 79, 243 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.