GCD of 391, 630, 109, 721 Calculator

Given Input numbers are 391, 630, 109, 721

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

Divisors of 391 :

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

1, 17, 23, 391

Divisors of 630 :

The positive integer divisors of 630 that completely divides 630 are.

1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 63, 70, 90, 105, 126, 210, 315, 630

Divisors of 109 :

The positive integer divisors of 109 that completely divides 109 are.

1, 109

Divisors of 721 :

The positive integer divisors of 721 that completely divides 721 are.

1, 7, 103, 721

GCD of numbers is the greatest common divisor

So, the GCD (391, 630, 109, 721) = 1.

Given numbers are 391, 630, 109, 721

The list of prime factors of all numbers are

Prime factors of 391 are 17 x 23

Prime factors of 630 are 2 x 3 x 3 x 5 x 7

Prime factors of 109 are 109

Prime factors of 721 are 7 x 103

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

Given numbers are 391, 630, 109, 721

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

Apply this formula for all numbers.

Step1:

LCM(391, 630) = 246330

GCD(391, 630) = ( 391 x 630 ) / 246330

= 391 / 630

= 391

Step2:

LCM(1, 109) = 109

GCD(1, 109) = ( 1 x 109 ) / 109

= 1 / 109

= 1

Step3:

LCM(1, 721) = 721

GCD(1, 721) = ( 1 x 721 ) / 721

= 1 / 721

= 1

So, Greatest Common Divisor of 391, 630, 109, 721 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 658, 469, 480, 380
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Given numbers are 391, 630, 109, 721
The greatest common divisor of numbers 391, 630, 109, 721 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 391, 630, 109, 721 is 1.

1. What is the GCD of 391, 630, 109, 721?

GCD of given numbers 391, 630, 109, 721 is 1

2. How to calculate the greatest common divisor of 391, 630, 109, 721?

We can find the highest common divisor of 391, 630, 109, 721 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 391, 630, 109, 721 i.e 1.

3. How can I use the GCD of 391, 630, 109, 721Calculator?

Out the numbers 391, 630, 109, 721 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.