GCD of 128, 697, 15, 285 Calculator

Given Input numbers are 128, 697, 15, 285

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 697

List of positive integer divisors of 697 that divides 697 without a remainder.

1, 17, 41, 697

Divisors of 15

List of positive integer divisors of 15 that divides 15 without a remainder.

1, 3, 5, 15

Divisors of 285

List of positive integer divisors of 285 that divides 285 without a remainder.

1, 3, 5, 15, 19, 57, 95, 285

Greatest Common Divisior

We found the divisors of 128, 697, 15, 285 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 128, 697, 15, 285 is 1.

Therefore, GCD of numbers 128, 697, 15, 285 is 1

Given Input Data is 128, 697, 15, 285

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 697 is 17 x 41

Prime Factorization of 15 is 3 x 5

Prime Factorization of 285 is 3 x 5 x 19

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, 697) = 89216

GCD(128, 697) = ( 128 x 697 ) / 89216

GCD(128, 697) = 89216 / 89216

GCD(128, 697) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 15

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

LCM(1, 15) = 15

GCD(1, 15) = ( 1 x 15 ) / 15

GCD(1, 15) = 15 / 15

GCD(1, 15) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 285

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

LCM(1, 285) = 285

GCD(1, 285) = ( 1 x 285 ) / 285

GCD(1, 285) = 285 / 285

GCD(1, 285) = 1

GCD of 128, 697, 15, 285 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 445, 440, 68, 380
• GCD of 819, 453, 21, 306
• GCD of 339, 569, 55, 635
• GCD of 556, 635, 10, 565
• GCD of 456, 445, 12, 654

1. What is the GCD of 128, 697, 15, 285?

GCD of 128, 697, 15, 285 is 1

2. Where do I get the detailed procedure to find GCD of 128, 697, 15, 285?

You can find a detailed procedure to find GCD of 128, 697, 15, 285 on our page.

3. How to find GCD of 128, 697, 15, 285 on a calculator?

You can find the GCD of 128, 697, 15, 285 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.