GCD of 391, 831, 68, 355 Calculator

Given Input numbers are 391, 831, 68, 355

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

Divisors of 391

List of positive integer divisors of 391 that divides 391 without a remainder.

1, 17, 23, 391

Divisors of 831

List of positive integer divisors of 831 that divides 831 without a remainder.

1, 3, 277, 831

Divisors of 68

List of positive integer divisors of 68 that divides 68 without a remainder.

1, 2, 4, 17, 34, 68

Divisors of 355

List of positive integer divisors of 355 that divides 355 without a remainder.

1, 5, 71, 355

Greatest Common Divisior

We found the divisors of 391, 831, 68, 355 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 391, 831, 68, 355 is 1.

Therefore, GCD of numbers 391, 831, 68, 355 is 1

Given Input Data is 391, 831, 68, 355

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

Prime Factorization of 391 is 17 x 23

Prime Factorization of 831 is 3 x 277

Prime Factorization of 68 is 2 x 2 x 17

Prime Factorization of 355 is 5 x 71

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(391, 831) = 324921

GCD(391, 831) = ( 391 x 831 ) / 324921

GCD(391, 831) = 324921 / 324921

GCD(391, 831) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 68

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

LCM(1, 68) = 68

GCD(1, 68) = ( 1 x 68 ) / 68

GCD(1, 68) = 68 / 68

GCD(1, 68) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 355

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

LCM(1, 355) = 355

GCD(1, 355) = ( 1 x 355 ) / 355

GCD(1, 355) = 355 / 355

GCD(1, 355) = 1

GCD of 391, 831, 68, 355 is 1

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1. What is the GCD of 391, 831, 68, 355?

GCD of 391, 831, 68, 355 is 1

2. Where do I get the detailed procedure to find GCD of 391, 831, 68, 355?

You can find a detailed procedure to find GCD of 391, 831, 68, 355 on our page.

3. How to find GCD of 391, 831, 68, 355 on a calculator?

You can find the GCD of 391, 831, 68, 355 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.