GCD of 820, 390, 688, 787 Calculator

Given Input numbers are 820, 390, 688, 787

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

Divisors of 820 :

The positive integer divisors of 820 that completely divides 820 are.

1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820

Divisors of 390 :

The positive integer divisors of 390 that completely divides 390 are.

1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390

Divisors of 688 :

The positive integer divisors of 688 that completely divides 688 are.

1, 2, 4, 8, 16, 43, 86, 172, 344, 688

Divisors of 787 :

The positive integer divisors of 787 that completely divides 787 are.

1, 787

GCD of numbers is the greatest common divisor

So, the GCD (820, 390, 688, 787) = 1.

Given numbers are 820, 390, 688, 787

The list of prime factors of all numbers are

Prime factors of 820 are 2 x 2 x 5 x 41

Prime factors of 390 are 2 x 3 x 5 x 13

Prime factors of 688 are 2 x 2 x 2 x 2 x 43

Prime factors of 787 are 787

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

Given numbers are 820, 390, 688, 787

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

Apply this formula for all numbers.

Step1:

LCM(820, 390) = 31980

GCD(820, 390) = ( 820 x 390 ) / 31980

= 820 / 390

= 820

Step2:

LCM(10, 688) = 3440

GCD(10, 688) = ( 10 x 688 ) / 3440

= 10 / 688

= 10

Step3:

LCM(2, 787) = 1574

GCD(2, 787) = ( 2 x 787 ) / 1574

= 2 / 787

= 2

So, Greatest Common Divisor of 820, 390, 688, 787 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 984, 860, 225, 588
• GCD of 827, 920, 683, 338
• GCD of 534, 131, 148, 560
• GCD of 404, 751, 815, 673
• GCD of 334, 879, 597, 932

Given numbers are 820, 390, 688, 787
The greatest common divisor of numbers 820, 390, 688, 787 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 820, 390, 688, 787 is 1.

1. What is the GCD of 820, 390, 688, 787?

GCD of given numbers 820, 390, 688, 787 is 1

2. How to calculate the greatest common divisor of 820, 390, 688, 787?

We can find the highest common divisor of 820, 390, 688, 787 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 820, 390, 688, 787 i.e 1.

3. How can I use the GCD of 820, 390, 688, 787Calculator?

Out the numbers 820, 390, 688, 787 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.