GCD of 78, 902, 647, 491 Calculator

Given Input numbers are 78, 902, 647, 491

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

Divisors of 78

List of positive integer divisors of 78 that divides 78 without a remainder.

1, 2, 3, 6, 13, 26, 39, 78

Divisors of 902

List of positive integer divisors of 902 that divides 902 without a remainder.

1, 2, 11, 22, 41, 82, 451, 902

Divisors of 647

List of positive integer divisors of 647 that divides 647 without a remainder.

1, 647

Divisors of 491

List of positive integer divisors of 491 that divides 491 without a remainder.

1, 491

Greatest Common Divisior

We found the divisors of 78, 902, 647, 491 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 78, 902, 647, 491 is 1.

Therefore, GCD of numbers 78, 902, 647, 491 is 1

Given Input Data is 78, 902, 647, 491

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

Prime Factorization of 78 is 2 x 3 x 13

Prime Factorization of 902 is 2 x 11 x 41

Prime Factorization of 647 is 647

Prime Factorization of 491 is 491

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(78, 902) = 35178

GCD(78, 902) = ( 78 x 902 ) / 35178

GCD(78, 902) = 70356 / 35178

GCD(78, 902) = 2

Step2:

Here we consider the GCD from the above i.e. 2 as first number and the next as 647

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

LCM(2, 647) = 1294

GCD(2, 647) = ( 2 x 647 ) / 1294

GCD(2, 647) = 1294 / 1294

GCD(2, 647) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 491

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

LCM(1, 491) = 491

GCD(1, 491) = ( 1 x 491 ) / 491

GCD(1, 491) = 491 / 491

GCD(1, 491) = 1

GCD of 78, 902, 647, 491 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 84, 751, 375, 318
• GCD of 35, 363, 629, 727
• GCD of 54, 808, 283, 440
• GCD of 90, 318, 901, 736
• GCD of 80, 850, 997, 664

1. What is the GCD of 78, 902, 647, 491?

GCD of 78, 902, 647, 491 is 1

2. Where do I get the detailed procedure to find GCD of 78, 902, 647, 491?

You can find a detailed procedure to find GCD of 78, 902, 647, 491 on our page.

3. How to find GCD of 78, 902, 647, 491 on a calculator?

You can find the GCD of 78, 902, 647, 491 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.