#include <iostream>
#include <vector>
#include <iomanip>
#include <algorithm>
#include <map>
#include <cmath>
#include <bitset>
#include <string>
#include <queue>
#include <stack>
#include <set>
#include <tuple>
#include <atcoder/all>
#include <sstream> // std::stringstream
#include <regex>
#include <fstream>
using namespace atcoder;
using mint = modint998244353;
//using mint = modint1000000007;
using namespace std;
using ll = long long;
static const double pi = 3.141592653589793;
const int INF = (1 << 29);
const ll mod = 998244353;
// ifstream ifs(""); ファイルはワークスペースのトップにおく

ll divisior(ll num){
    ll c = 0;
    for(ll i=2;i*i<=num;i++){
        if(num%i==0){
            c++;
            if(num/i != i) c++;
        }
    }
    return c;
}

int main() {
    ll n,k;
    cin >> n >> k;
    if(k==0) cout << divisior(n) + 2 << endl;
    else cout << divisior(n-k)+1 << endl;
}