GCD of 638, 890, 247, 397 Calculator

Given Input numbers are 638, 890, 247, 397

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

Divisors of 638

List of positive integer divisors of 638 that divides 638 without a remainder.

1, 2, 11, 22, 29, 58, 319, 638

Divisors of 890

List of positive integer divisors of 890 that divides 890 without a remainder.

1, 2, 5, 10, 89, 178, 445, 890

Divisors of 247

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

1, 13, 19, 247

Divisors of 397

List of positive integer divisors of 397 that divides 397 without a remainder.

1, 397

Greatest Common Divisior

We found the divisors of 638, 890, 247, 397 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 638, 890, 247, 397 is 1.

Therefore, GCD of numbers 638, 890, 247, 397 is 1

Given Input Data is 638, 890, 247, 397

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

Prime Factorization of 638 is 2 x 11 x 29

Prime Factorization of 890 is 2 x 5 x 89

Prime Factorization of 247 is 13 x 19

Prime Factorization of 397 is 397

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(638, 890) = 283910

GCD(638, 890) = ( 638 x 890 ) / 283910

GCD(638, 890) = 567820 / 283910

GCD(638, 890) = 2

Step2:

Here we consider the GCD from the above i.e. 2 as first number and the next as 247

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

LCM(2, 247) = 494

GCD(2, 247) = ( 2 x 247 ) / 494

GCD(2, 247) = 494 / 494

GCD(2, 247) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 397

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

LCM(1, 397) = 397

GCD(1, 397) = ( 1 x 397 ) / 397

GCD(1, 397) = 397 / 397

GCD(1, 397) = 1

GCD of 638, 890, 247, 397 is 1

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1. What is the GCD of 638, 890, 247, 397?

GCD of 638, 890, 247, 397 is 1

2. Where do I get the detailed procedure to find GCD of 638, 890, 247, 397?

You can find a detailed procedure to find GCD of 638, 890, 247, 397 on our page.

3. How to find GCD of 638, 890, 247, 397 on a calculator?

You can find the GCD of 638, 890, 247, 397 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.