GCD of 247, 209, 646, 957 Calculator

Given Input numbers are 247, 209, 646, 957

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

Divisors of 247

List of positive integer divisors of 247 that divides 247 without a remainder.

1, 13, 19, 247

Divisors of 209

List of positive integer divisors of 209 that divides 209 without a remainder.

1, 11, 19, 209

Divisors of 646

List of positive integer divisors of 646 that divides 646 without a remainder.

1, 2, 17, 19, 34, 38, 323, 646

Divisors of 957

List of positive integer divisors of 957 that divides 957 without a remainder.

1, 3, 11, 29, 33, 87, 319, 957

Greatest Common Divisior

We found the divisors of 247, 209, 646, 957 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 247, 209, 646, 957 is 1.

Therefore, GCD of numbers 247, 209, 646, 957 is 1

Given Input Data is 247, 209, 646, 957

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

Prime Factorization of 247 is 13 x 19

Prime Factorization of 209 is 11 x 19

Prime Factorization of 646 is 2 x 17 x 19

Prime Factorization of 957 is 3 x 11 x 29

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(247, 209) = 2717

GCD(247, 209) = ( 247 x 209 ) / 2717

GCD(247, 209) = 51623 / 2717

GCD(247, 209) = 19

Step2:

Here we consider the GCD from the above i.e. 19 as first number and the next as 646

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

LCM(19, 646) = 646

GCD(19, 646) = ( 19 x 646 ) / 646

GCD(19, 646) = 12274 / 646

GCD(19, 646) = 19

Step3:

Here we consider the GCD from the above i.e. 19 as first number and the next as 957

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

LCM(19, 957) = 18183

GCD(19, 957) = ( 19 x 957 ) / 18183

GCD(19, 957) = 18183 / 18183

GCD(19, 957) = 1

GCD of 247, 209, 646, 957 is 1

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1. What is the GCD of 247, 209, 646, 957?

GCD of 247, 209, 646, 957 is 1

2. Where do I get the detailed procedure to find GCD of 247, 209, 646, 957?

You can find a detailed procedure to find GCD of 247, 209, 646, 957 on our page.

3. How to find GCD of 247, 209, 646, 957 on a calculator?

You can find the GCD of 247, 209, 646, 957 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.