GCD of 721, 420, 790, 885 Calculator

Given Input numbers are 721, 420, 790, 885

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

Divisors of 721

List of positive integer divisors of 721 that divides 721 without a remainder.

1, 7, 103, 721

Divisors of 420

List of positive integer divisors of 420 that divides 420 without a remainder.

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420

Divisors of 790

List of positive integer divisors of 790 that divides 790 without a remainder.

1, 2, 5, 10, 79, 158, 395, 790

Divisors of 885

List of positive integer divisors of 885 that divides 885 without a remainder.

1, 3, 5, 15, 59, 177, 295, 885

Greatest Common Divisior

We found the divisors of 721, 420, 790, 885 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 721, 420, 790, 885 is 1.

Therefore, GCD of numbers 721, 420, 790, 885 is 1

Given Input Data is 721, 420, 790, 885

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

Prime Factorization of 721 is 7 x 103

Prime Factorization of 420 is 2 x 2 x 3 x 5 x 7

Prime Factorization of 790 is 2 x 5 x 79

Prime Factorization of 885 is 3 x 5 x 59

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(721, 420) = 43260

GCD(721, 420) = ( 721 x 420 ) / 43260

GCD(721, 420) = 302820 / 43260

GCD(721, 420) = 7

Step2:

Here we consider the GCD from the above i.e. 7 as first number and the next as 790

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

LCM(7, 790) = 5530

GCD(7, 790) = ( 7 x 790 ) / 5530

GCD(7, 790) = 5530 / 5530

GCD(7, 790) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 885

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

LCM(1, 885) = 885

GCD(1, 885) = ( 1 x 885 ) / 885

GCD(1, 885) = 885 / 885

GCD(1, 885) = 1

GCD of 721, 420, 790, 885 is 1

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1. What is the GCD of 721, 420, 790, 885?

GCD of 721, 420, 790, 885 is 1

2. Where do I get the detailed procedure to find GCD of 721, 420, 790, 885?

You can find a detailed procedure to find GCD of 721, 420, 790, 885 on our page.

3. How to find GCD of 721, 420, 790, 885 on a calculator?

You can find the GCD of 721, 420, 790, 885 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.