GCD of 81, 5, 18, 70 Calculator

Given Input numbers are 81, 5, 18, 70

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

Divisors of 81

List of positive integer divisors of 81 that divides 81 without a remainder.

1, 3, 9, 27, 81

Divisors of 5

List of positive integer divisors of 5 that divides 5 without a remainder.

1, 5

Divisors of 18

List of positive integer divisors of 18 that divides 18 without a remainder.

1, 2, 3, 6, 9, 18

Divisors of 70

List of positive integer divisors of 70 that divides 70 without a remainder.

1, 2, 5, 7, 10, 14, 35, 70

Greatest Common Divisior

We found the divisors of 81, 5, 18, 70 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 81, 5, 18, 70 is 1.

Therefore, GCD of numbers 81, 5, 18, 70 is 1

Given Input Data is 81, 5, 18, 70

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

Prime Factorization of 81 is 3 x 3 x 3 x 3

Prime Factorization of 5 is 5

Prime Factorization of 18 is 2 x 3 x 3

Prime Factorization of 70 is 2 x 5 x 7

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(81, 5) = 405

GCD(81, 5) = ( 81 x 5 ) / 405

GCD(81, 5) = 405 / 405

GCD(81, 5) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 18

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

LCM(1, 18) = 18

GCD(1, 18) = ( 1 x 18 ) / 18

GCD(1, 18) = 18 / 18

GCD(1, 18) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 70

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

LCM(1, 70) = 70

GCD(1, 70) = ( 1 x 70 ) / 70

GCD(1, 70) = 70 / 70

GCD(1, 70) = 1

GCD of 81, 5, 18, 70 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 45, 2, 73, 62
• GCD of 64, 9, 69, 27
• GCD of 66, 2, 95, 14
• GCD of 99, 7, 52, 19
• GCD of 83, 8, 62, 41

1. What is the GCD of 81, 5, 18, 70?

GCD of 81, 5, 18, 70 is 1

2. Where do I get the detailed procedure to find GCD of 81, 5, 18, 70?

You can find a detailed procedure to find GCD of 81, 5, 18, 70 on our page.

3. How to find GCD of 81, 5, 18, 70 on a calculator?

You can find the GCD of 81, 5, 18, 70 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.