Given a number, find the total number of divisors of the factorial of the number. Since the answer can be very large, print the answer modulo 10^9+7.
Input format:
The first line contains T, the number of test cases.
T lines follow each containing the number N.
Output format:
Print T lines of output each containing the answer.
Constraints:
1 <= T <= 500
0 <= N <= 50000
Sample Input:
3 2 3 4
Sample Output:
2 4 8
Code:
#include <iostream>
#include <math.h>
#define m 1000000007
#define ll long long int
using namespace std;
void makeSieve(ll n)
{
bool *isprime = new bool[n + 1];
for (ll i = 0; i < n + 1; i++)
{
isprime[i] = true;
}
isprime[0] = false;
isprime[1] = false;
for (ll i = 2; i <= sqrt(n); i++)
{
if (isprime[i])
for (ll j = i; j * i <= n; j++)
{
isprime[j * i] = false;
}
}
ll total_divisors = 1;
for (ll i = 0; i < n + 1; i++)
{
if (isprime[i])
{
ll current_sum = 0;
for (ll j = 1; pow(i, j) <= n; j++)
{
current_sum += n / pow(i, j);
}
total_divisors =(total_divisors%m * (current_sum + 1)%m)%m;
}
}
cout << total_divisors << endl;
delete[] isprime;
}
int main()
{
ll t;
cin >> t;
while (t--)
{
ll n;
cin >> n;
makeSieve(n);
}
}
Code language: C++ (cpp)