GCD of 947, 391, 21 Calculator

Given Input numbers are 947, 391, 21

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

Divisors of 947 :

The positive integer divisors of 947 that completely divides 947 are.

1, 947

Divisors of 391 :

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

1, 17, 23, 391

Divisors of 21 :

The positive integer divisors of 21 that completely divides 21 are.

1, 3, 7, 21

GCD of numbers is the greatest common divisor

So, the GCD (947, 391, 21) = 1.

Given numbers are 947, 391, 21

The list of prime factors of all numbers are

Prime factors of 947 are 947

Prime factors of 391 are 17 x 23

Prime factors of 21 are 3 x 7

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

Given numbers are 947, 391, 21

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

Apply this formula for all numbers.

Step1:

LCM(947, 391) = 370277

GCD(947, 391) = ( 947 x 391 ) / 370277

= 947 / 391

= 947

Step2:

LCM(1, 21) = 21

GCD(1, 21) = ( 1 x 21 ) / 21

= 1 / 21

= 1

So, Greatest Common Divisor of 947, 391, 21 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 861, 109, 69
• GCD of 674, 681, 25
• GCD of 141, 200, 32
• GCD of 775, 996, 62
• GCD of 325, 779, 17

Given numbers are 947, 391, 21
The greatest common divisor of numbers 947, 391, 21 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 947, 391, 21 is 1.

1. What is the GCD of 947, 391, 21?

GCD of given numbers 947, 391, 21 is 1

2. How to calculate the greatest common divisor of 947, 391, 21?

We can find the highest common divisor of 947, 391, 21 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 947, 391, 21 i.e 1.

3. How can I use the GCD of 947, 391, 21Calculator?

Out the numbers 947, 391, 21 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.