GCD of 821, 945, 139, 391 Calculator

Given Input numbers are 821, 945, 139, 391

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 945 :

The positive integer divisors of 945 that completely divides 945 are.

1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945

Divisors of 139 :

The positive integer divisors of 139 that completely divides 139 are.

1, 139

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 (821, 945, 139, 391) = 1.

Given numbers are 821, 945, 139, 391

The list of prime factors of all numbers are

Prime factors of 821 are 821

Prime factors of 945 are 3 x 3 x 3 x 5 x 7

Prime factors of 139 are 139

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 821, 945, 139, 391

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

Apply this formula for all numbers.

Step1:

LCM(821, 945) = 775845

GCD(821, 945) = ( 821 x 945 ) / 775845

= 821 / 945

= 821

Step2:

LCM(1, 139) = 139

GCD(1, 139) = ( 1 x 139 ) / 139

= 1 / 139

= 1

Step3:

LCM(1, 391) = 391

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

= 1 / 391

= 1

So, Greatest Common Divisor of 821, 945, 139, 391 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 912, 764, 729, 197
• GCD of 420, 315, 374, 331
• GCD of 126, 148, 674, 175
• GCD of 734, 653, 818, 386
• GCD of 928, 361, 855, 598

Given numbers are 821, 945, 139, 391
The greatest common divisor of numbers 821, 945, 139, 391 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 821, 945, 139, 391 is 1.

1. What is the GCD of 821, 945, 139, 391?

GCD of given numbers 821, 945, 139, 391 is 1

2. How to calculate the greatest common divisor of 821, 945, 139, 391?

We can find the highest common divisor of 821, 945, 139, 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 821, 945, 139, 391 i.e 1.

3. How can I use the GCD of 821, 945, 139, 391Calculator?

Out the numbers 821, 945, 139, 391 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.