Online GCD Calculator is useful to find the GCD of 420, 640, 803, 505 quickly. Get the easiest ways to solve the greatest common divisor of 420, 640, 803, 505 i.e 1 in different methods as follows.
Given Input numbers are 420, 640, 803, 505
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 640 :
The positive integer divisors of 640 that completely divides 640 are.
1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
Divisors of 803 :
The positive integer divisors of 803 that completely divides 803 are.
1, 11, 73, 803
Divisors of 505 :
The positive integer divisors of 505 that completely divides 505 are.
1, 5, 101, 505
GCD of numbers is the greatest common divisor
So, the GCD (420, 640, 803, 505) = 1.
Given numbers are 420, 640, 803, 505
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 640 are 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5
Prime factors of 803 are 11 x 73
Prime factors of 505 are 5 x 101
The above numbers do not have any common prime factor. So GCD is 1
Given numbers are 420, 640, 803, 505
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(420, 640) = 13440
GCD(420, 640) = ( 420 x 640 ) / 13440
= 420 / 640
= 420
Step2:
LCM(20, 803) = 16060
GCD(20, 803) = ( 20 x 803 ) / 16060
= 20 / 803
= 20
Step3:
LCM(1, 505) = 505
GCD(1, 505) = ( 1 x 505 ) / 505
= 1 / 505
= 1
So, Greatest Common Divisor of 420, 640, 803, 505 is 1
Here are some samples of GCD of Numbers calculations.
Given numbers are 420, 640, 803, 505
The greatest common divisor of numbers 420, 640, 803, 505 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 420, 640, 803, 505 is 1.
1. What is the GCD of 420, 640, 803, 505?
GCD of given numbers 420, 640, 803, 505 is 1
2. How to calculate the greatest common divisor of 420, 640, 803, 505?
We can find the highest common divisor of 420, 640, 803, 505 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, 640, 803, 505 i.e 1.
3. How can I use the GCD of 420, 640, 803, 505Calculator?
Out the numbers 420, 640, 803, 505 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.