GCD of 420, 921, 197, 809 Calculator

Given Input numbers are 420, 921, 197, 809

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 921 :

The positive integer divisors of 921 that completely divides 921 are.

1, 3, 307, 921

Divisors of 197 :

The positive integer divisors of 197 that completely divides 197 are.

1, 197

Divisors of 809 :

The positive integer divisors of 809 that completely divides 809 are.

1, 809

GCD of numbers is the greatest common divisor

So, the GCD (420, 921, 197, 809) = 1.

Given numbers are 420, 921, 197, 809

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 921 are 3 x 307

Prime factors of 197 are 197

Prime factors of 809 are 809

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

Given numbers are 420, 921, 197, 809

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

Apply this formula for all numbers.

Step1:

LCM(420, 921) = 128940

GCD(420, 921) = ( 420 x 921 ) / 128940

= 420 / 921

= 420

Step2:

LCM(3, 197) = 591

GCD(3, 197) = ( 3 x 197 ) / 591

= 3 / 197

= 3

Step3:

LCM(1, 809) = 809

GCD(1, 809) = ( 1 x 809 ) / 809

= 1 / 809

= 1

So, Greatest Common Divisor of 420, 921, 197, 809 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 965, 784, 113, 798
• GCD of 128, 492, 208, 147
• GCD of 768, 260, 623, 278
• GCD of 495, 767, 127, 381
• GCD of 248, 345, 359, 791

Given numbers are 420, 921, 197, 809
The greatest common divisor of numbers 420, 921, 197, 809 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 420, 921, 197, 809 is 1.

1. What is the GCD of 420, 921, 197, 809?

GCD of given numbers 420, 921, 197, 809 is 1

2. How to calculate the greatest common divisor of 420, 921, 197, 809?

We can find the highest common divisor of 420, 921, 197, 809 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, 921, 197, 809 i.e 1.

3. How can I use the GCD of 420, 921, 197, 809Calculator?

Out the numbers 420, 921, 197, 809 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.