iut individual 11 ques no c

/*  TAHMID RAHMAN
    DAMIAN FOREVER
     MATH LOVER
    NEVER GIVE UP
*/
#include<bits/stdc++.h>
using namespace std;
#define pi acos(-1.0)
#define fastio ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define ll long long
#define pb push_back
#define fi first
#define se second
#define in insert
#define mp make_pair
#define GCD(a,b) __gcd(a,b);
#define endl "\n"
#define FRU freopen("out.txt","w",stdout)
#define FRO freopen("in.txt","r",stdin)
#define INFLL 9223372036854775807
//Don't hesitate to ask me if you don't understand my code.......Happy coding,Tahmid...;
int main()
{
    fastio;
    ll x,y,f,i,c=0;
    cin>>x>>y>>f;

    while(1)
    {
        ll n=x;
        vector<ll>v;
        v.clear();
        for(i=1;i<=sqrt(n);i++)
        {
            if(n%i==0)
            {
                v.pb(i);
                if(i!=(n/i))
                    v.pb(n/i);
            }
        }
        if(v.size()==f)
        {
            c++;
        }

        if(x!=y)
        {
            x++;
        }
        else
            break;
    }
    cout<<c<<endl;

}