GCD of 457, 387, 247, 638 Calculator

Given Input numbers are 457, 387, 247, 638

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

Divisors of 457

List of positive integer divisors of 457 that divides 457 without a remainder.

1, 457

Divisors of 387

List of positive integer divisors of 387 that divides 387 without a remainder.

1, 3, 9, 43, 129, 387

Divisors of 247

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

1, 13, 19, 247

Divisors of 638

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

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

Greatest Common Divisior

We found the divisors of 457, 387, 247, 638 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 457, 387, 247, 638 is 1.

Therefore, GCD of numbers 457, 387, 247, 638 is 1

Given Input Data is 457, 387, 247, 638

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

Prime Factorization of 457 is 457

Prime Factorization of 387 is 3 x 3 x 43

Prime Factorization of 247 is 13 x 19

Prime Factorization of 638 is 2 x 11 x 29

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(457, 387) = 176859

GCD(457, 387) = ( 457 x 387 ) / 176859

GCD(457, 387) = 176859 / 176859

GCD(457, 387) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 247

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

LCM(1, 247) = 247

GCD(1, 247) = ( 1 x 247 ) / 247

GCD(1, 247) = 247 / 247

GCD(1, 247) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 638

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

LCM(1, 638) = 638

GCD(1, 638) = ( 1 x 638 ) / 638

GCD(1, 638) = 638 / 638

GCD(1, 638) = 1

GCD of 457, 387, 247, 638 is 1

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1. What is the GCD of 457, 387, 247, 638?

GCD of 457, 387, 247, 638 is 1

2. Where do I get the detailed procedure to find GCD of 457, 387, 247, 638?

You can find a detailed procedure to find GCD of 457, 387, 247, 638 on our page.

3. How to find GCD of 457, 387, 247, 638 on a calculator?

You can find the GCD of 457, 387, 247, 638 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.