GCD of 128, 142, 781, 891 Calculator

Given Input numbers are 128, 142, 781, 891

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

Divisors of 128

List of positive integer divisors of 128 that divides 128 without a remainder.

1, 2, 4, 8, 16, 32, 64, 128

Divisors of 142

List of positive integer divisors of 142 that divides 142 without a remainder.

1, 2, 71, 142

Divisors of 781

List of positive integer divisors of 781 that divides 781 without a remainder.

1, 11, 71, 781

Divisors of 891

List of positive integer divisors of 891 that divides 891 without a remainder.

1, 3, 9, 11, 27, 33, 81, 99, 297, 891

Greatest Common Divisior

We found the divisors of 128, 142, 781, 891 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 128, 142, 781, 891 is 1.

Therefore, GCD of numbers 128, 142, 781, 891 is 1

Given Input Data is 128, 142, 781, 891

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

Prime Factorization of 128 is 2 x 2 x 2 x 2 x 2 x 2 x 2

Prime Factorization of 142 is 2 x 71

Prime Factorization of 781 is 11 x 71

Prime Factorization of 891 is 3 x 3 x 3 x 3 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(128, 142) = 9088

GCD(128, 142) = ( 128 x 142 ) / 9088

GCD(128, 142) = 18176 / 9088

GCD(128, 142) = 2

Step2:

Here we consider the GCD from the above i.e. 2 as first number and the next as 781

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

LCM(2, 781) = 1562

GCD(2, 781) = ( 2 x 781 ) / 1562

GCD(2, 781) = 1562 / 1562

GCD(2, 781) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 891

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

LCM(1, 891) = 891

GCD(1, 891) = ( 1 x 891 ) / 891

GCD(1, 891) = 891 / 891

GCD(1, 891) = 1

GCD of 128, 142, 781, 891 is 1

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1. What is the GCD of 128, 142, 781, 891?

GCD of 128, 142, 781, 891 is 1

2. Where do I get the detailed procedure to find GCD of 128, 142, 781, 891?

You can find a detailed procedure to find GCD of 128, 142, 781, 891 on our page.

3. How to find GCD of 128, 142, 781, 891 on a calculator?

You can find the GCD of 128, 142, 781, 891 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.