# C++ program to find count of divisors in n! In this Program, we are going to share a C++ program to find count of divisors in n!. If you are a beginner and want to start learning the C++ programming, then keep your close attention in this tutorial as I am going to share a program for C++ program to find count of divisors in n!.

• Collection of 100+ C++ problems with solutions.

## C++ program to find count of divisors in n!

Copy the below C++ program and execute it with the help of GCC compiler. At the end of this program, We have shared the output of this program.

```#include

using namespace std;

typedef unsigned long long int ull;

vector allPrimes;

// Fills above vector allPrimes[] for a given n
void sieve(int n)
{
// Create a boolean array "prime[0..n]" and
// initialize all entries it as true. A value
// in prime[i] will finally be false if i is
// not a prime, else true.
vector prime(n+1, true);

// Loop to update prime[]
for (int p=2; p*p
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C++ program to find count of divisors in n!

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