GCD of 428, 813, 491, 391 Calculator

Given Input numbers are 428, 813, 491, 391

In the factoring method, we have to find the divisors of all numbers

Divisors of 428 :

The positive integer divisors of 428 that completely divides 428 are.

1, 2, 4, 107, 214, 428

Divisors of 813 :

The positive integer divisors of 813 that completely divides 813 are.

1, 3, 271, 813

Divisors of 491 :

The positive integer divisors of 491 that completely divides 491 are.

1, 491

Divisors of 391 :

The positive integer divisors of 391 that completely divides 391 are.

1, 17, 23, 391

GCD of numbers is the greatest common divisor

So, the GCD (428, 813, 491, 391) = 1.

Given numbers are 428, 813, 491, 391

The list of prime factors of all numbers are

Prime factors of 428 are 2 x 2 x 107

Prime factors of 813 are 3 x 271

Prime factors of 491 are 491

Prime factors of 391 are 17 x 23

The above numbers do not have any common prime factor. So GCD is 1

Given numbers are 428, 813, 491, 391

GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)

Apply this formula for all numbers.

Step1:

LCM(428, 813) = 347964

GCD(428, 813) = ( 428 x 813 ) / 347964

= 428 / 813

= 428

Step2:

LCM(1, 491) = 491

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

= 1 / 491

= 1

Step3:

LCM(1, 391) = 391

GCD(1, 391) = ( 1 x 391 ) / 391

= 1 / 391

= 1

So, Greatest Common Divisor of 428, 813, 491, 391 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 942, 788, 450, 875
• GCD of 353, 620, 288, 752
• GCD of 408, 780, 884, 970
• GCD of 945, 317, 308, 915
• GCD of 542, 510, 719, 925

Given numbers are 428, 813, 491, 391
The greatest common divisor of numbers 428, 813, 491, 391 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 428, 813, 491, 391 is 1.

1. What is the GCD of 428, 813, 491, 391?

GCD of given numbers 428, 813, 491, 391 is 1

2. How to calculate the greatest common divisor of 428, 813, 491, 391?

We can find the highest common divisor of 428, 813, 491, 391 easily using the prime factorization method. Just list the prime factors of all numbers and pick the highest common factor which is the GCD of 428, 813, 491, 391 i.e 1.

3. How can I use the GCD of 428, 813, 491, 391Calculator?

Out the numbers 428, 813, 491, 391 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.