#include <iostream>
using namespace std;
int main()
{
    int n, ans = 0;
    cin >> n;
    for(int i = 1; i <= n; ++ i)
    {
        if(n % i == 0) ans ++;
    }
    cout << ans << '\n';
    return 0;
}

test lambda表达式

#include<bits/stdc++.h>
#define int long long
#define PII pair<int,int>
#define ULL unsigned long long
#define all(v) v.begin(), v.end()
#define debug(a) cout<<#a<<"="<<a<<endl;
using namespace std;
constexpr int N =  1 * 1e6 + 10,M = 5 * 1e3 + 10,inf = 0x3f3f3f3f;


void solve()
{
    int n;
    cin >> n;
    auto get_div = [](int n)
    {
        vector<int> res;
        for(int i=1;i<n/i;i++)
        {
            if(n % i == 0)
            {
                res.push_back(i);
                if(n/i != i) res.push_back(n/i);
            }
        }
        // sort(all(res));
        return res;
    };
    cout << get_div(n).size() << '\n';
}
signed main()
{
    ios::sync_with_stdio(0);cin.tie(nullptr),cout.tie(nullptr);
    int _=1;
    // cin>>_;
    while(_--)
    {
        solve();
    }
    return 0;
}

/**
 *    author: Nijika_jia
 *    created: 2024.12.03 20:10:01
 */