GCD of 397, 280, 61, 813 Calculator

Given Input numbers are 397, 280, 61, 813

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

Divisors of 397

List of positive integer divisors of 397 that divides 397 without a remainder.

1, 397

Divisors of 280

List of positive integer divisors of 280 that divides 280 without a remainder.

1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280

Divisors of 61

List of positive integer divisors of 61 that divides 61 without a remainder.

1, 61

Divisors of 813

List of positive integer divisors of 813 that divides 813 without a remainder.

1, 3, 271, 813

Greatest Common Divisior

We found the divisors of 397, 280, 61, 813 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 397, 280, 61, 813 is 1.

Therefore, GCD of numbers 397, 280, 61, 813 is 1

Given Input Data is 397, 280, 61, 813

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

Prime Factorization of 397 is 397

Prime Factorization of 280 is 2 x 2 x 2 x 5 x 7

Prime Factorization of 61 is 61

Prime Factorization of 813 is 3 x 271

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(397, 280) = 111160

GCD(397, 280) = ( 397 x 280 ) / 111160

GCD(397, 280) = 111160 / 111160

GCD(397, 280) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 61

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

LCM(1, 61) = 61

GCD(1, 61) = ( 1 x 61 ) / 61

GCD(1, 61) = 61 / 61

GCD(1, 61) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 813

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

LCM(1, 813) = 813

GCD(1, 813) = ( 1 x 813 ) / 813

GCD(1, 813) = 813 / 813

GCD(1, 813) = 1

GCD of 397, 280, 61, 813 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 700, 400, 18, 172
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• GCD of 311, 786, 12, 550
• GCD of 267, 198, 42, 987
• GCD of 597, 972, 52, 446

1. What is the GCD of 397, 280, 61, 813?

GCD of 397, 280, 61, 813 is 1

2. Where do I get the detailed procedure to find GCD of 397, 280, 61, 813?

You can find a detailed procedure to find GCD of 397, 280, 61, 813 on our page.

3. How to find GCD of 397, 280, 61, 813 on a calculator?

You can find the GCD of 397, 280, 61, 813 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.