#include<iostream>
#include<array>
#include<string>
#include<cstdio>
#include<vector>
#include<cmath>
#include<algorithm>
#include<functional>
#include<iomanip>
#include<queue>
#include<ciso646>
#include<random>
#include<map>
#include<set>
#include<complex>
#include<bitset>
#include<stack>
#include<unordered_map>
#include<utility>
#include<tuple>
#include<cassert>
using namespace std;
typedef unsigned long long ll;
const ll mod = 1000000007;
const ll INF = (ll)1000000007 * 1000000007;
typedef pair<int, int> P;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define Rep(i,sta,n) for(int i=sta;i<n;i++)
#define Per(i,sta,n) for(int i=n-1;i>=sta;i--)
typedef long double ld;
const ld eps = 1e-8;
const ld pi = acos(-1.0);
typedef pair<ll, ll> LP;
int dx[4]={1,-1,0,0};
int dy[4]={0,0,1,-1};
template<class T>bool chmax(T &a, const T &b) {if(a<b){a=b;return 1;}return 0;}
template<class T>bool chmin(T &a, const T &b) {if(b<a){a=b;return 1;}return 0;}

ll N,M,K;
map<ll,int> ma;

ll Kth_root(ll x,int k){
    if(x==1) return 1;
    if(k>64) return 1;
    ll l=0,r=numeric_limits<ll>::max();
    while(r-l>1){
        ll mid=(l+r)/(ll)2;
        ll d=mid;
        bool larger=false;
        rep(i,k-1){
            if(d>x/mid+(ll)1){
                larger=true;
                break;
            }
            d*=mid;
        }
        if(d>x) larger=true;
        if(larger) r=mid;
        else l=mid;
    }
    return l;
}

void solve(){
    cin >> N >> K >> M;
    Rep(i,2,35){
        ll A=1;
        while(true){
            ll Z=1;
            bool flag=false;
            rep(j,i+1){
                Z*=A+j*K;
                if(Z>N) {
                    flag=true;
                    break;
                }
            }
            if(flag) break;
            ma[Z]++;
            A++;
        }
    }
    ll ans=0;
    if(M==1){
        ll l=0,r=mod;
        while(r-l>1){
            ll mid=(l+r)/2;
            if(mid*(mid+K)>N) r=mid;
            else l=mid;
        }
        //cout << l << " " << l*(l+K) << endl;
        ans+=l;
    }
    for(auto p:ma){
        bool f=false;
        ll l=0,r=mod;
        while(r-l>1){
            ll mid=(l+r)/2;
            if(mid*(mid+K)>p.first) r=mid;
            else l=mid;
        }
        //cout << p.first << " " << p.second << " " << l << " " << l*(l+K) << endl;
        if(l*(l+K)==p.first) f=true;
        cout << f+p.second << endl;
        if(f+p.second==M) ans++;
        if(M==1 && f) if(p.second>=1) {
            ans--;
        }
    }
    cout << ans << endl;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(50);
    solve();
}