GCD of 815, 798, 90, 620 Calculator

Given Input numbers are 815, 798, 90, 620

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

Divisors of 815

List of positive integer divisors of 815 that divides 815 without a remainder.

1, 5, 163, 815

Divisors of 798

List of positive integer divisors of 798 that divides 798 without a remainder.

1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399, 798

Divisors of 90

List of positive integer divisors of 90 that divides 90 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

Divisors of 620

List of positive integer divisors of 620 that divides 620 without a remainder.

1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620

Greatest Common Divisior

We found the divisors of 815, 798, 90, 620 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 815, 798, 90, 620 is 1.

Therefore, GCD of numbers 815, 798, 90, 620 is 1

Given Input Data is 815, 798, 90, 620

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

Prime Factorization of 815 is 5 x 163

Prime Factorization of 798 is 2 x 3 x 7 x 19

Prime Factorization of 90 is 2 x 3 x 3 x 5

Prime Factorization of 620 is 2 x 2 x 5 x 31

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(815, 798) = 650370

GCD(815, 798) = ( 815 x 798 ) / 650370

GCD(815, 798) = 650370 / 650370

GCD(815, 798) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 90

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

LCM(1, 90) = 90

GCD(1, 90) = ( 1 x 90 ) / 90

GCD(1, 90) = 90 / 90

GCD(1, 90) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 620

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

LCM(1, 620) = 620

GCD(1, 620) = ( 1 x 620 ) / 620

GCD(1, 620) = 620 / 620

GCD(1, 620) = 1

GCD of 815, 798, 90, 620 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 380, 308, 48, 926
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• GCD of 673, 105, 23, 339

1. What is the GCD of 815, 798, 90, 620?

GCD of 815, 798, 90, 620 is 1

2. Where do I get the detailed procedure to find GCD of 815, 798, 90, 620?

You can find a detailed procedure to find GCD of 815, 798, 90, 620 on our page.

3. How to find GCD of 815, 798, 90, 620 on a calculator?

You can find the GCD of 815, 798, 90, 620 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.