GCD of 129, 987, 68, 392 Calculator

Given Input numbers are 129, 987, 68, 392

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

Divisors of 129

List of positive integer divisors of 129 that divides 129 without a remainder.

1, 3, 43, 129

Divisors of 987

List of positive integer divisors of 987 that divides 987 without a remainder.

1, 3, 7, 21, 47, 141, 329, 987

Divisors of 68

List of positive integer divisors of 68 that divides 68 without a remainder.

1, 2, 4, 17, 34, 68

Divisors of 392

List of positive integer divisors of 392 that divides 392 without a remainder.

1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392

Greatest Common Divisior

We found the divisors of 129, 987, 68, 392 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 129, 987, 68, 392 is 1.

Therefore, GCD of numbers 129, 987, 68, 392 is 1

Given Input Data is 129, 987, 68, 392

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

Prime Factorization of 129 is 3 x 43

Prime Factorization of 987 is 3 x 7 x 47

Prime Factorization of 68 is 2 x 2 x 17

Prime Factorization of 392 is 2 x 2 x 2 x 7 x 7

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(129, 987) = 42441

GCD(129, 987) = ( 129 x 987 ) / 42441

GCD(129, 987) = 127323 / 42441

GCD(129, 987) = 3

Step2:

Here we consider the GCD from the above i.e. 3 as first number and the next as 68

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

LCM(3, 68) = 204

GCD(3, 68) = ( 3 x 68 ) / 204

GCD(3, 68) = 204 / 204

GCD(3, 68) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 392

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

LCM(1, 392) = 392

GCD(1, 392) = ( 1 x 392 ) / 392

GCD(1, 392) = 392 / 392

GCD(1, 392) = 1

GCD of 129, 987, 68, 392 is 1

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• GCD of 902, 731, 59, 992
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1. What is the GCD of 129, 987, 68, 392?

GCD of 129, 987, 68, 392 is 1

2. Where do I get the detailed procedure to find GCD of 129, 987, 68, 392?

You can find a detailed procedure to find GCD of 129, 987, 68, 392 on our page.

3. How to find GCD of 129, 987, 68, 392 on a calculator?

You can find the GCD of 129, 987, 68, 392 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.