GCD of 637, 136, 399, 421 Calculator

Given Input numbers are 637, 136, 399, 421

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

Divisors of 637

List of positive integer divisors of 637 that divides 637 without a remainder.

1, 7, 13, 49, 91, 637

Divisors of 136

List of positive integer divisors of 136 that divides 136 without a remainder.

1, 2, 4, 8, 17, 34, 68, 136

Divisors of 399

List of positive integer divisors of 399 that divides 399 without a remainder.

1, 3, 7, 19, 21, 57, 133, 399

Divisors of 421

List of positive integer divisors of 421 that divides 421 without a remainder.

1, 421

Greatest Common Divisior

We found the divisors of 637, 136, 399, 421 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 637, 136, 399, 421 is 1.

Therefore, GCD of numbers 637, 136, 399, 421 is 1

Given Input Data is 637, 136, 399, 421

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

Prime Factorization of 637 is 7 x 7 x 13

Prime Factorization of 136 is 2 x 2 x 2 x 17

Prime Factorization of 399 is 3 x 7 x 19

Prime Factorization of 421 is 421

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(637, 136) = 86632

GCD(637, 136) = ( 637 x 136 ) / 86632

GCD(637, 136) = 86632 / 86632

GCD(637, 136) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 399

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

LCM(1, 399) = 399

GCD(1, 399) = ( 1 x 399 ) / 399

GCD(1, 399) = 399 / 399

GCD(1, 399) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 421

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

LCM(1, 421) = 421

GCD(1, 421) = ( 1 x 421 ) / 421

GCD(1, 421) = 421 / 421

GCD(1, 421) = 1

GCD of 637, 136, 399, 421 is 1

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1. What is the GCD of 637, 136, 399, 421?

GCD of 637, 136, 399, 421 is 1

2. Where do I get the detailed procedure to find GCD of 637, 136, 399, 421?

You can find a detailed procedure to find GCD of 637, 136, 399, 421 on our page.

3. How to find GCD of 637, 136, 399, 421 on a calculator?

You can find the GCD of 637, 136, 399, 421 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.