GCD of 438, 781, 729 Calculator

Given Input numbers are 438, 781, 729

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

Divisors of 438

List of positive integer divisors of 438 that divides 438 without a remainder.

1, 2, 3, 6, 73, 146, 219, 438

Divisors of 781

List of positive integer divisors of 781 that divides 781 without a remainder.

1, 11, 71, 781

Divisors of 729

List of positive integer divisors of 729 that divides 729 without a remainder.

1, 3, 9, 27, 81, 243, 729

Greatest Common Divisior

We found the divisors of 438, 781, 729 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 438, 781, 729 is 1.

Therefore, GCD of numbers 438, 781, 729 is 1

Given Input Data is 438, 781, 729

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

Prime Factorization of 438 is 2 x 3 x 73

Prime Factorization of 781 is 11 x 71

Prime Factorization of 729 is 3 x 3 x 3 x 3 x 3 x 3

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(438, 781) = 342078

GCD(438, 781) = ( 438 x 781 ) / 342078

GCD(438, 781) = 342078 / 342078

GCD(438, 781) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 729

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

LCM(1, 729) = 729

GCD(1, 729) = ( 1 x 729 ) / 729

GCD(1, 729) = 729 / 729

GCD(1, 729) = 1

GCD of 438, 781, 729 is 1

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1. What is the GCD of 438, 781, 729?

GCD of 438, 781, 729 is 1

2. Where do I get the detailed procedure to find GCD of 438, 781, 729?

You can find a detailed procedure to find GCD of 438, 781, 729 on our page.

3. How to find GCD of 438, 781, 729 on a calculator?

You can find the GCD of 438, 781, 729 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.