GCD of 129, 977, 42, 388 Calculator

Given Input numbers are 129, 977, 42, 388

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 977

List of positive integer divisors of 977 that divides 977 without a remainder.

1, 977

Divisors of 42

List of positive integer divisors of 42 that divides 42 without a remainder.

1, 2, 3, 6, 7, 14, 21, 42

Divisors of 388

List of positive integer divisors of 388 that divides 388 without a remainder.

1, 2, 4, 97, 194, 388

Greatest Common Divisior

We found the divisors of 129, 977, 42, 388 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 129, 977, 42, 388 is 1.

Therefore, GCD of numbers 129, 977, 42, 388 is 1

Given Input Data is 129, 977, 42, 388

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

Prime Factorization of 129 is 3 x 43

Prime Factorization of 977 is 977

Prime Factorization of 42 is 2 x 3 x 7

Prime Factorization of 388 is 2 x 2 x 97

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, 977) = 126033

GCD(129, 977) = ( 129 x 977 ) / 126033

GCD(129, 977) = 126033 / 126033

GCD(129, 977) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 42

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

LCM(1, 42) = 42

GCD(1, 42) = ( 1 x 42 ) / 42

GCD(1, 42) = 42 / 42

GCD(1, 42) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 388

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

LCM(1, 388) = 388

GCD(1, 388) = ( 1 x 388 ) / 388

GCD(1, 388) = 388 / 388

GCD(1, 388) = 1

GCD of 129, 977, 42, 388 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 646, 326, 48, 459
• GCD of 105, 344, 41, 713
• GCD of 419, 204, 48, 946
• GCD of 856, 251, 37, 435
• GCD of 417, 385, 74, 370

1. What is the GCD of 129, 977, 42, 388?

GCD of 129, 977, 42, 388 is 1

2. Where do I get the detailed procedure to find GCD of 129, 977, 42, 388?

You can find a detailed procedure to find GCD of 129, 977, 42, 388 on our page.

3. How to find GCD of 129, 977, 42, 388 on a calculator?

You can find the GCD of 129, 977, 42, 388 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.