GCD of 391, 685, 238, 158 Calculator

Given Input numbers are 391, 685, 238, 158

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 685

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

1, 5, 137, 685

Divisors of 238

List of positive integer divisors of 238 that divides 238 without a remainder.

1, 2, 7, 14, 17, 34, 119, 238

Divisors of 158

List of positive integer divisors of 158 that divides 158 without a remainder.

1, 2, 79, 158

Greatest Common Divisior

We found the divisors of 391, 685, 238, 158 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 391, 685, 238, 158 is 1.

Therefore, GCD of numbers 391, 685, 238, 158 is 1

Given Input Data is 391, 685, 238, 158

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

Prime Factorization of 391 is 17 x 23

Prime Factorization of 685 is 5 x 137

Prime Factorization of 238 is 2 x 7 x 17

Prime Factorization of 158 is 2 x 79

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, 685) = 267835

GCD(391, 685) = ( 391 x 685 ) / 267835

GCD(391, 685) = 267835 / 267835

GCD(391, 685) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 238

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

LCM(1, 238) = 238

GCD(1, 238) = ( 1 x 238 ) / 238

GCD(1, 238) = 238 / 238

GCD(1, 238) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 158

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

LCM(1, 158) = 158

GCD(1, 158) = ( 1 x 158 ) / 158

GCD(1, 158) = 158 / 158

GCD(1, 158) = 1

GCD of 391, 685, 238, 158 is 1

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1. What is the GCD of 391, 685, 238, 158?

GCD of 391, 685, 238, 158 is 1

2. Where do I get the detailed procedure to find GCD of 391, 685, 238, 158?

You can find a detailed procedure to find GCD of 391, 685, 238, 158 on our page.

3. How to find GCD of 391, 685, 238, 158 on a calculator?

You can find the GCD of 391, 685, 238, 158 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.