GCD of 397, 781, 447, 655 Calculator

Given Input numbers are 397, 781, 447, 655

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

Divisors of 397

List of positive integer divisors of 397 that divides 397 without a remainder.

1, 397

Divisors of 781

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

1, 11, 71, 781

Divisors of 447

List of positive integer divisors of 447 that divides 447 without a remainder.

1, 3, 149, 447

Divisors of 655

List of positive integer divisors of 655 that divides 655 without a remainder.

1, 5, 131, 655

Greatest Common Divisior

We found the divisors of 397, 781, 447, 655 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 397, 781, 447, 655 is 1.

Therefore, GCD of numbers 397, 781, 447, 655 is 1

Given Input Data is 397, 781, 447, 655

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

Prime Factorization of 397 is 397

Prime Factorization of 781 is 11 x 71

Prime Factorization of 447 is 3 x 149

Prime Factorization of 655 is 5 x 131

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(397, 781) = 310057

GCD(397, 781) = ( 397 x 781 ) / 310057

GCD(397, 781) = 310057 / 310057

GCD(397, 781) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 447

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

LCM(1, 447) = 447

GCD(1, 447) = ( 1 x 447 ) / 447

GCD(1, 447) = 447 / 447

GCD(1, 447) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 655

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

LCM(1, 655) = 655

GCD(1, 655) = ( 1 x 655 ) / 655

GCD(1, 655) = 655 / 655

GCD(1, 655) = 1

GCD of 397, 781, 447, 655 is 1

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1. What is the GCD of 397, 781, 447, 655?

GCD of 397, 781, 447, 655 is 1

2. Where do I get the detailed procedure to find GCD of 397, 781, 447, 655?

You can find a detailed procedure to find GCD of 397, 781, 447, 655 on our page.

3. How to find GCD of 397, 781, 447, 655 on a calculator?

You can find the GCD of 397, 781, 447, 655 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.