GCD of 391, 560, 618, 990 Calculator

Given Input numbers are 391, 560, 618, 990

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

Divisors of 391

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

1, 17, 23, 391

Divisors of 560

List of positive integer divisors of 560 that divides 560 without a remainder.

1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560

Divisors of 618

List of positive integer divisors of 618 that divides 618 without a remainder.

1, 2, 3, 6, 103, 206, 309, 618

Divisors of 990

List of positive integer divisors of 990 that divides 990 without a remainder.

1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990

Greatest Common Divisior

We found the divisors of 391, 560, 618, 990 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 391, 560, 618, 990 is 1.

Therefore, GCD of numbers 391, 560, 618, 990 is 1

Given Input Data is 391, 560, 618, 990

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

Prime Factorization of 391 is 17 x 23

Prime Factorization of 560 is 2 x 2 x 2 x 2 x 5 x 7

Prime Factorization of 618 is 2 x 3 x 103

Prime Factorization of 990 is 2 x 3 x 3 x 5 x 11

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(391, 560) = 218960

GCD(391, 560) = ( 391 x 560 ) / 218960

GCD(391, 560) = 218960 / 218960

GCD(391, 560) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 618

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

LCM(1, 618) = 618

GCD(1, 618) = ( 1 x 618 ) / 618

GCD(1, 618) = 618 / 618

GCD(1, 618) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 990

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

LCM(1, 990) = 990

GCD(1, 990) = ( 1 x 990 ) / 990

GCD(1, 990) = 990 / 990

GCD(1, 990) = 1

GCD of 391, 560, 618, 990 is 1

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1. What is the GCD of 391, 560, 618, 990?

GCD of 391, 560, 618, 990 is 1

2. Where do I get the detailed procedure to find GCD of 391, 560, 618, 990?

You can find a detailed procedure to find GCD of 391, 560, 618, 990 on our page.

3. How to find GCD of 391, 560, 618, 990 on a calculator?

You can find the GCD of 391, 560, 618, 990 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.