GCD of 821, 261, 387, 390 Calculator

Given Input numbers are 821, 261, 387, 390

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

Divisors of 821 :

The positive integer divisors of 821 that completely divides 821 are.

1, 821

Divisors of 261 :

The positive integer divisors of 261 that completely divides 261 are.

1, 3, 9, 29, 87, 261

Divisors of 387 :

The positive integer divisors of 387 that completely divides 387 are.

1, 3, 9, 43, 129, 387

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

GCD of numbers is the greatest common divisor

So, the GCD (821, 261, 387, 390) = 1.

Given numbers are 821, 261, 387, 390

The list of prime factors of all numbers are

Prime factors of 821 are 821

Prime factors of 261 are 3 x 3 x 29

Prime factors of 387 are 3 x 3 x 43

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

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

Given numbers are 821, 261, 387, 390

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

Apply this formula for all numbers.

Step1:

LCM(821, 261) = 214281

GCD(821, 261) = ( 821 x 261 ) / 214281

= 821 / 261

= 821

Step2:

LCM(1, 387) = 387

GCD(1, 387) = ( 1 x 387 ) / 387

= 1 / 387

= 1

Step3:

LCM(1, 390) = 390

GCD(1, 390) = ( 1 x 390 ) / 390

= 1 / 390

= 1

So, Greatest Common Divisor of 821, 261, 387, 390 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 938, 181, 860, 112
• GCD of 685, 563, 869, 965
• GCD of 379, 942, 419, 408
• GCD of 623, 678, 269, 468
• GCD of 673, 652, 549, 449

Given numbers are 821, 261, 387, 390
The greatest common divisor of numbers 821, 261, 387, 390 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 821, 261, 387, 390 is 1.

1. What is the GCD of 821, 261, 387, 390?

GCD of given numbers 821, 261, 387, 390 is 1

2. How to calculate the greatest common divisor of 821, 261, 387, 390?

We can find the highest common divisor of 821, 261, 387, 390 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 821, 261, 387, 390 i.e 1.

3. How can I use the GCD of 821, 261, 387, 390Calculator?

Out the numbers 821, 261, 387, 390 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.