Where do I get the detailed procedure to find GCD of 821, 247, 638?

You can find a detailed procedure to find GCD of 821, 247, 638 on our page.

How to find GCD of 821, 247, 638 on a calculator?

You can find the GCD of 821, 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.

GCD of 821, 247, 638 Calculator

Created By : Veerendra
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023

Online GCD Calculator is useful to find the GCD of 821, 247, 638 quickly. Get the easiest ways to solve the greatest common divisor of 821, 247, 638 i.e 1 in different methods as follows.

How to Find GCD of Numbers 821, 247, 638 with Factoring?

Given Input numbers are 821, 247, 638

In the factoring method, we have to find the divisors of all numbers

Divisors of 821 :

The positive integer divisors of 821 that completely divides 821 are.

1, 821

Divisors of 247 :

The positive integer divisors of 247 that completely divides 247 are.

1, 13, 19, 247

Divisors of 638 :

The positive integer divisors of 638 that completely divides 638 are.

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

GCD of numbers is the greatest common divisor

So, the GCD (821, 247, 638) = 1.

Find GCD of 821, 247, 638 using Prime Factorization

Given numbers are 821, 247, 638

The list of prime factors of all numbers are

Prime factors of 821 are 821

Prime factors of 247 are 13 x 19

Prime factors of 638 are 2 x 11 x 29

The above numbers do not have any common prime factor. So GCD is 1

Steps to Calculate GCD of 821, 247, 638 using LCM Formula

Given numbers are 821, 247, 638

GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)

Apply this formula for all numbers.

Step1:

LCM(821, 247) = 202787

GCD(821, 247) = ( 821 x 247 ) / 202787

= 821 / 247

= 821

Step2:

LCM(1, 638) = 638

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

= 1 / 638

= 1

So, Greatest Common Divisor of 821, 247, 638 is 1

GCD of Numbers Calculation Examples

Here are some samples of GCD of Numbers calculations.

Greatest Common Divisor of 821, 247, 638

Given numbers are 821, 247, 638
The greatest common divisor of numbers 821, 247, 638 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 821, 247, 638 is 1.

FAQs on GCD of 821, 247, 638 Calculator

1. What is the GCD of 821, 247, 638?

GCD of given numbers 821, 247, 638 is 1

2. How to calculate the greatest common divisor of 821, 247, 638?

We can find the highest common divisor of 821, 247, 638 easily using the prime factorization method. Just list the prime factors of all numbers and pick the highest common factor which is the GCD of 821, 247, 638 i.e 1.

3. How can I use the GCD of 821, 247, 638Calculator?

Out the numbers 821, 247, 638 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.