/съвършени числа/
Definition 1
Perfect Number is a positive integer that equals the sum of its divisors (except itself).
Definition 2
Perfect number is positive integer that is half the sum of all its divisors (including itself).
We don’t know:
- if there are infinite number of perfect numbers
- if there are any odd perfect numbers
C++:
int n = 1000;
int sum;
for (int i = 1; i < n; i++)
{
sum = 0;
for (int j = 1; j < i / 2; j++)
{
if (i % j == 0)
sum = sum + j;
}
if (sum == i)
cout << i << endl;
}