GCD of 420, 398, 187, 647 Calculator

Given Input numbers are 420, 398, 187, 647

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

Divisors of 420 :

The positive integer divisors of 420 that completely divides 420 are.

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420

Divisors of 398 :

The positive integer divisors of 398 that completely divides 398 are.

1, 2, 199, 398

Divisors of 187 :

The positive integer divisors of 187 that completely divides 187 are.

1, 11, 17, 187

Divisors of 647 :

The positive integer divisors of 647 that completely divides 647 are.

1, 647

GCD of numbers is the greatest common divisor

So, the GCD (420, 398, 187, 647) = 1.

Given numbers are 420, 398, 187, 647

The list of prime factors of all numbers are

Prime factors of 420 are 2 x 2 x 3 x 5 x 7

Prime factors of 398 are 2 x 199

Prime factors of 187 are 11 x 17

Prime factors of 647 are 647

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

Given numbers are 420, 398, 187, 647

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

Apply this formula for all numbers.

Step1:

LCM(420, 398) = 83580

GCD(420, 398) = ( 420 x 398 ) / 83580

= 420 / 398

= 420

Step2:

LCM(2, 187) = 374

GCD(2, 187) = ( 2 x 187 ) / 374

= 2 / 187

= 2

Step3:

LCM(1, 647) = 647

GCD(1, 647) = ( 1 x 647 ) / 647

= 1 / 647

= 1

So, Greatest Common Divisor of 420, 398, 187, 647 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 927, 895, 671, 333
• GCD of 339, 233, 250, 163
• GCD of 251, 842, 326, 696
• GCD of 848, 143, 870, 310
• GCD of 914, 608, 996, 341

Given numbers are 420, 398, 187, 647
The greatest common divisor of numbers 420, 398, 187, 647 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 420, 398, 187, 647 is 1.

1. What is the GCD of 420, 398, 187, 647?

GCD of given numbers 420, 398, 187, 647 is 1

2. How to calculate the greatest common divisor of 420, 398, 187, 647?

We can find the highest common divisor of 420, 398, 187, 647 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 420, 398, 187, 647 i.e 1.

3. How can I use the GCD of 420, 398, 187, 647Calculator?

Out the numbers 420, 398, 187, 647 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.