GCD of 782, 640, 491, 389 Calculator

Given Input numbers are 782, 640, 491, 389

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

Divisors of 782

List of positive integer divisors of 782 that divides 782 without a remainder.

1, 2, 17, 23, 34, 46, 391, 782

Divisors of 640

List of positive integer divisors of 640 that divides 640 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640

Divisors of 491

List of positive integer divisors of 491 that divides 491 without a remainder.

1, 491

Divisors of 389

List of positive integer divisors of 389 that divides 389 without a remainder.

1, 389

Greatest Common Divisior

We found the divisors of 782, 640, 491, 389 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 782, 640, 491, 389 is 1.

Therefore, GCD of numbers 782, 640, 491, 389 is 1

Given Input Data is 782, 640, 491, 389

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

Prime Factorization of 782 is 2 x 17 x 23

Prime Factorization of 640 is 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5

Prime Factorization of 491 is 491

Prime Factorization of 389 is 389

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(782, 640) = 250240

GCD(782, 640) = ( 782 x 640 ) / 250240

GCD(782, 640) = 500480 / 250240

GCD(782, 640) = 2

Step2:

Here we consider the GCD from the above i.e. 2 as first number and the next as 491

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

LCM(2, 491) = 982

GCD(2, 491) = ( 2 x 491 ) / 982

GCD(2, 491) = 982 / 982

GCD(2, 491) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 389

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

LCM(1, 389) = 389

GCD(1, 389) = ( 1 x 389 ) / 389

GCD(1, 389) = 389 / 389

GCD(1, 389) = 1

GCD of 782, 640, 491, 389 is 1

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1. What is the GCD of 782, 640, 491, 389?

GCD of 782, 640, 491, 389 is 1

2. Where do I get the detailed procedure to find GCD of 782, 640, 491, 389?

You can find a detailed procedure to find GCD of 782, 640, 491, 389 on our page.

3. How to find GCD of 782, 640, 491, 389 on a calculator?

You can find the GCD of 782, 640, 491, 389 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.