GCD of 221, 580, 42, 391 Calculator

Given Input numbers are 221, 580, 42, 391

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

Divisors of 221

List of positive integer divisors of 221 that divides 221 without a remainder.

1, 13, 17, 221

Divisors of 580

List of positive integer divisors of 580 that divides 580 without a remainder.

1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580

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 391

List of positive integer divisors of 391 that divides 391 without a remainder.

1, 17, 23, 391

Greatest Common Divisior

We found the divisors of 221, 580, 42, 391 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 221, 580, 42, 391 is 1.

Therefore, GCD of numbers 221, 580, 42, 391 is 1

Given Input Data is 221, 580, 42, 391

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

Prime Factorization of 221 is 13 x 17

Prime Factorization of 580 is 2 x 2 x 5 x 29

Prime Factorization of 42 is 2 x 3 x 7

Prime Factorization of 391 is 17 x 23

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(221, 580) = 128180

GCD(221, 580) = ( 221 x 580 ) / 128180

GCD(221, 580) = 128180 / 128180

GCD(221, 580) = 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 391

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

LCM(1, 391) = 391

GCD(1, 391) = ( 1 x 391 ) / 391

GCD(1, 391) = 391 / 391

GCD(1, 391) = 1

GCD of 221, 580, 42, 391 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 460, 947, 15, 526
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• GCD of 456, 328, 46, 958

1. What is the GCD of 221, 580, 42, 391?

GCD of 221, 580, 42, 391 is 1

2. Where do I get the detailed procedure to find GCD of 221, 580, 42, 391?

You can find a detailed procedure to find GCD of 221, 580, 42, 391 on our page.

3. How to find GCD of 221, 580, 42, 391 on a calculator?

You can find the GCD of 221, 580, 42, 391 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.