GCD of 813, 840, 530, 644 Calculator

Given Input numbers are 813, 840, 530, 644

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

Divisors of 813 :

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

1, 3, 271, 813

Divisors of 840 :

The positive integer divisors of 840 that completely divides 840 are.

1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840

Divisors of 530 :

The positive integer divisors of 530 that completely divides 530 are.

1, 2, 5, 10, 53, 106, 265, 530

Divisors of 644 :

The positive integer divisors of 644 that completely divides 644 are.

1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644

GCD of numbers is the greatest common divisor

So, the GCD (813, 840, 530, 644) = 1.

Given numbers are 813, 840, 530, 644

The list of prime factors of all numbers are

Prime factors of 813 are 3 x 271

Prime factors of 840 are 2 x 2 x 2 x 3 x 5 x 7

Prime factors of 530 are 2 x 5 x 53

Prime factors of 644 are 2 x 2 x 7 x 23

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

Given numbers are 813, 840, 530, 644

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

Apply this formula for all numbers.

Step1:

LCM(813, 840) = 227640

GCD(813, 840) = ( 813 x 840 ) / 227640

= 813 / 840

= 813

Step2:

LCM(3, 530) = 1590

GCD(3, 530) = ( 3 x 530 ) / 1590

= 3 / 530

= 3

Step3:

LCM(1, 644) = 644

GCD(1, 644) = ( 1 x 644 ) / 644

= 1 / 644

= 1

So, Greatest Common Divisor of 813, 840, 530, 644 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 449, 172, 431, 958
• GCD of 493, 972, 334, 384
• GCD of 881, 217, 420, 992
• GCD of 433, 899, 890, 360
• GCD of 525, 826, 270, 968

Given numbers are 813, 840, 530, 644
The greatest common divisor of numbers 813, 840, 530, 644 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 813, 840, 530, 644 is 1.

1. What is the GCD of 813, 840, 530, 644?

GCD of given numbers 813, 840, 530, 644 is 1

2. How to calculate the greatest common divisor of 813, 840, 530, 644?

We can find the highest common divisor of 813, 840, 530, 644 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 813, 840, 530, 644 i.e 1.

3. How can I use the GCD of 813, 840, 530, 644Calculator?

Out the numbers 813, 840, 530, 644 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.