GCD of 315, 155, 991, 643 Calculator

Given Input numbers are 315, 155, 991, 643

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

Divisors of 315 :

The positive integer divisors of 315 that completely divides 315 are.

1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315

Divisors of 155 :

The positive integer divisors of 155 that completely divides 155 are.

1, 5, 31, 155

Divisors of 991 :

The positive integer divisors of 991 that completely divides 991 are.

1, 991

Divisors of 643 :

The positive integer divisors of 643 that completely divides 643 are.

1, 643

GCD of numbers is the greatest common divisor

So, the GCD (315, 155, 991, 643) = 1.

Given numbers are 315, 155, 991, 643

The list of prime factors of all numbers are

Prime factors of 315 are 3 x 3 x 5 x 7

Prime factors of 155 are 5 x 31

Prime factors of 991 are 991

Prime factors of 643 are 643

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

Given numbers are 315, 155, 991, 643

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

Apply this formula for all numbers.

Step1:

LCM(315, 155) = 9765

GCD(315, 155) = ( 315 x 155 ) / 9765

= 315 / 155

= 315

Step2:

LCM(5, 991) = 4955

GCD(5, 991) = ( 5 x 991 ) / 4955

= 5 / 991

= 5

Step3:

LCM(1, 643) = 643

GCD(1, 643) = ( 1 x 643 ) / 643

= 1 / 643

= 1

So, Greatest Common Divisor of 315, 155, 991, 643 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 936, 927, 454, 665
• GCD of 867, 383, 730, 361
• GCD of 781, 510, 691, 390
• GCD of 868, 611, 357, 380
• GCD of 113, 990, 656, 226

Given numbers are 315, 155, 991, 643
The greatest common divisor of numbers 315, 155, 991, 643 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 315, 155, 991, 643 is 1.

1. What is the GCD of 315, 155, 991, 643?

GCD of given numbers 315, 155, 991, 643 is 1

2. How to calculate the greatest common divisor of 315, 155, 991, 643?

We can find the highest common divisor of 315, 155, 991, 643 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 315, 155, 991, 643 i.e 1.

3. How can I use the GCD of 315, 155, 991, 643Calculator?

Out the numbers 315, 155, 991, 643 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.