GCD of 81, 620, 178, 861 Calculator

Given Input numbers are 81, 620, 178, 861

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

Divisors of 81

List of positive integer divisors of 81 that divides 81 without a remainder.

1, 3, 9, 27, 81

Divisors of 620

List of positive integer divisors of 620 that divides 620 without a remainder.

1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620

Divisors of 178

List of positive integer divisors of 178 that divides 178 without a remainder.

1, 2, 89, 178

Divisors of 861

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

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

Greatest Common Divisior

We found the divisors of 81, 620, 178, 861 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 81, 620, 178, 861 is 1.

Therefore, GCD of numbers 81, 620, 178, 861 is 1

Given Input Data is 81, 620, 178, 861

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

Prime Factorization of 81 is 3 x 3 x 3 x 3

Prime Factorization of 620 is 2 x 2 x 5 x 31

Prime Factorization of 178 is 2 x 89

Prime Factorization of 861 is 3 x 7 x 41

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(81, 620) = 50220

GCD(81, 620) = ( 81 x 620 ) / 50220

GCD(81, 620) = 50220 / 50220

GCD(81, 620) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 178

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

LCM(1, 178) = 178

GCD(1, 178) = ( 1 x 178 ) / 178

GCD(1, 178) = 178 / 178

GCD(1, 178) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 861

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

LCM(1, 861) = 861

GCD(1, 861) = ( 1 x 861 ) / 861

GCD(1, 861) = 861 / 861

GCD(1, 861) = 1

GCD of 81, 620, 178, 861 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 33, 311, 909, 632
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• GCD of 97, 386, 582, 793
• GCD of 35, 653, 497, 530

1. What is the GCD of 81, 620, 178, 861?

GCD of 81, 620, 178, 861 is 1

2. Where do I get the detailed procedure to find GCD of 81, 620, 178, 861?

You can find a detailed procedure to find GCD of 81, 620, 178, 861 on our page.

3. How to find GCD of 81, 620, 178, 861 on a calculator?

You can find the GCD of 81, 620, 178, 861 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.