GCD of 489, 861, 79, 891 Calculator

Given Input numbers are 489, 861, 79, 891

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

Divisors of 489

List of positive integer divisors of 489 that divides 489 without a remainder.

1, 3, 163, 489

Divisors of 861

List of positive integer divisors of 861 that divides 861 without a remainder.

1, 3, 7, 21, 41, 123, 287, 861

Divisors of 79

List of positive integer divisors of 79 that divides 79 without a remainder.

1, 79

Divisors of 891

List of positive integer divisors of 891 that divides 891 without a remainder.

1, 3, 9, 11, 27, 33, 81, 99, 297, 891

Greatest Common Divisior

We found the divisors of 489, 861, 79, 891 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 489, 861, 79, 891 is 1.

Therefore, GCD of numbers 489, 861, 79, 891 is 1

Given Input Data is 489, 861, 79, 891

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

Prime Factorization of 489 is 3 x 163

Prime Factorization of 861 is 3 x 7 x 41

Prime Factorization of 79 is 79

Prime Factorization of 891 is 3 x 3 x 3 x 3 x 11

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(489, 861) = 140343

GCD(489, 861) = ( 489 x 861 ) / 140343

GCD(489, 861) = 421029 / 140343

GCD(489, 861) = 3

Step2:

Here we consider the GCD from the above i.e. 3 as first number and the next as 79

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

LCM(3, 79) = 237

GCD(3, 79) = ( 3 x 79 ) / 237

GCD(3, 79) = 237 / 237

GCD(3, 79) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 891

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

LCM(1, 891) = 891

GCD(1, 891) = ( 1 x 891 ) / 891

GCD(1, 891) = 891 / 891

GCD(1, 891) = 1

GCD of 489, 861, 79, 891 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 686, 273, 78, 493
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• GCD of 377, 646, 29, 889
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• GCD of 376, 407, 55, 404

1. What is the GCD of 489, 861, 79, 891?

GCD of 489, 861, 79, 891 is 1

2. Where do I get the detailed procedure to find GCD of 489, 861, 79, 891?

You can find a detailed procedure to find GCD of 489, 861, 79, 891 on our page.

3. How to find GCD of 489, 861, 79, 891 on a calculator?

You can find the GCD of 489, 861, 79, 891 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.