GCD of 646, 839, 438, 861 Calculator

Given Input numbers are 646, 839, 438, 861

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

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 839

List of positive integer divisors of 839 that divides 839 without a remainder.

1, 839

Divisors of 438

List of positive integer divisors of 438 that divides 438 without a remainder.

1, 2, 3, 6, 73, 146, 219, 438

Divisors of 861

List of positive integer divisors of 861 that divides 861 without a remainder.

1, 3, 7, 21, 41, 123, 287, 861

Greatest Common Divisior

We found the divisors of 646, 839, 438, 861 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 646, 839, 438, 861 is 1.

Therefore, GCD of numbers 646, 839, 438, 861 is 1

Given Input Data is 646, 839, 438, 861

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

Prime Factorization of 646 is 2 x 17 x 19

Prime Factorization of 839 is 839

Prime Factorization of 438 is 2 x 3 x 73

Prime Factorization of 861 is 3 x 7 x 41

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(646, 839) = 541994

GCD(646, 839) = ( 646 x 839 ) / 541994

GCD(646, 839) = 541994 / 541994

GCD(646, 839) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 438

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

LCM(1, 438) = 438

GCD(1, 438) = ( 1 x 438 ) / 438

GCD(1, 438) = 438 / 438

GCD(1, 438) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 861

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

LCM(1, 861) = 861

GCD(1, 861) = ( 1 x 861 ) / 861

GCD(1, 861) = 861 / 861

GCD(1, 861) = 1

GCD of 646, 839, 438, 861 is 1

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1. What is the GCD of 646, 839, 438, 861?

GCD of 646, 839, 438, 861 is 1

2. Where do I get the detailed procedure to find GCD of 646, 839, 438, 861?

You can find a detailed procedure to find GCD of 646, 839, 438, 861 on our page.

3. How to find GCD of 646, 839, 438, 861 on a calculator?

You can find the GCD of 646, 839, 438, 861 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.