GCD of 787, 420, 978, 220 Calculator

Given Input numbers are 787, 420, 978, 220

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

Divisors of 787 :

The positive integer divisors of 787 that completely divides 787 are.

1, 787

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 978 :

The positive integer divisors of 978 that completely divides 978 are.

1, 2, 3, 6, 163, 326, 489, 978

Divisors of 220 :

The positive integer divisors of 220 that completely divides 220 are.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220

GCD of numbers is the greatest common divisor

So, the GCD (787, 420, 978, 220) = 1.

Given numbers are 787, 420, 978, 220

The list of prime factors of all numbers are

Prime factors of 787 are 787

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

Prime factors of 978 are 2 x 3 x 163

Prime factors of 220 are 2 x 2 x 5 x 11

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

Given numbers are 787, 420, 978, 220

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

Apply this formula for all numbers.

Step1:

LCM(787, 420) = 330540

GCD(787, 420) = ( 787 x 420 ) / 330540

= 787 / 420

= 787

Step2:

LCM(1, 978) = 978

GCD(1, 978) = ( 1 x 978 ) / 978

= 1 / 978

= 1

Step3:

LCM(1, 220) = 220

GCD(1, 220) = ( 1 x 220 ) / 220

= 1 / 220

= 1

So, Greatest Common Divisor of 787, 420, 978, 220 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 500, 404, 574, 960
• GCD of 100, 920, 752, 527
• GCD of 513, 356, 427, 967
• GCD of 245, 169, 993, 802
• GCD of 852, 160, 914, 243

Given numbers are 787, 420, 978, 220
The greatest common divisor of numbers 787, 420, 978, 220 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 787, 420, 978, 220 is 1.

1. What is the GCD of 787, 420, 978, 220?

GCD of given numbers 787, 420, 978, 220 is 1

2. How to calculate the greatest common divisor of 787, 420, 978, 220?

We can find the highest common divisor of 787, 420, 978, 220 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 787, 420, 978, 220 i.e 1.

3. How can I use the GCD of 787, 420, 978, 220Calculator?

Out the numbers 787, 420, 978, 220 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.