GCD of 685, 561, 788, 243 Calculator

Given Input numbers are 685, 561, 788, 243

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

Divisors of 685

List of positive integer divisors of 685 that divides 685 without a remainder.

1, 5, 137, 685

Divisors of 561

List of positive integer divisors of 561 that divides 561 without a remainder.

1, 3, 11, 17, 33, 51, 187, 561

Divisors of 788

List of positive integer divisors of 788 that divides 788 without a remainder.

1, 2, 4, 197, 394, 788

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 685, 561, 788, 243 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 685, 561, 788, 243 is 1.

Therefore, GCD of numbers 685, 561, 788, 243 is 1

Given Input Data is 685, 561, 788, 243

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

Prime Factorization of 685 is 5 x 137

Prime Factorization of 561 is 3 x 11 x 17

Prime Factorization of 788 is 2 x 2 x 197

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(685, 561) = 384285

GCD(685, 561) = ( 685 x 561 ) / 384285

GCD(685, 561) = 384285 / 384285

GCD(685, 561) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 788

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

LCM(1, 788) = 788

GCD(1, 788) = ( 1 x 788 ) / 788

GCD(1, 788) = 788 / 788

GCD(1, 788) = 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 685, 561, 788, 243 is 1

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1. What is the GCD of 685, 561, 788, 243?

GCD of 685, 561, 788, 243 is 1

2. Where do I get the detailed procedure to find GCD of 685, 561, 788, 243?

You can find a detailed procedure to find GCD of 685, 561, 788, 243 on our page.

3. How to find GCD of 685, 561, 788, 243 on a calculator?

You can find the GCD of 685, 561, 788, 243 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.