GCD of 81, 291, 365, 639 Calculator

Given Input numbers are 81, 291, 365, 639

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 291

List of positive integer divisors of 291 that divides 291 without a remainder.

1, 3, 97, 291

Divisors of 365

List of positive integer divisors of 365 that divides 365 without a remainder.

1, 5, 73, 365

Divisors of 639

List of positive integer divisors of 639 that divides 639 without a remainder.

1, 3, 9, 71, 213, 639

Greatest Common Divisior

We found the divisors of 81, 291, 365, 639 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 81, 291, 365, 639 is 1.

Therefore, GCD of numbers 81, 291, 365, 639 is 1

Given Input Data is 81, 291, 365, 639

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 291 is 3 x 97

Prime Factorization of 365 is 5 x 73

Prime Factorization of 639 is 3 x 3 x 71

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, 291) = 7857

GCD(81, 291) = ( 81 x 291 ) / 7857

GCD(81, 291) = 23571 / 7857

GCD(81, 291) = 3

Step2:

Here we consider the GCD from the above i.e. 3 as first number and the next as 365

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

LCM(3, 365) = 1095

GCD(3, 365) = ( 3 x 365 ) / 1095

GCD(3, 365) = 1095 / 1095

GCD(3, 365) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 639

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

LCM(1, 639) = 639

GCD(1, 639) = ( 1 x 639 ) / 639

GCD(1, 639) = 639 / 639

GCD(1, 639) = 1

GCD of 81, 291, 365, 639 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 85, 369, 136, 176
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• GCD of 70, 212, 894, 353
• GCD of 47, 615, 255, 560
• GCD of 99, 827, 860, 249

1. What is the GCD of 81, 291, 365, 639?

GCD of 81, 291, 365, 639 is 1

2. Where do I get the detailed procedure to find GCD of 81, 291, 365, 639?

You can find a detailed procedure to find GCD of 81, 291, 365, 639 on our page.

3. How to find GCD of 81, 291, 365, 639 on a calculator?

You can find the GCD of 81, 291, 365, 639 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.