#include<iostream>
#include<bits/stdc++.h>
using namespace std;
#define fr(i,a,b) for(ll i=a;i<b;i++)
#define ll long long
#define cline cout<<endl
int main()
{
int a,b;
cin>>a>>b;
if(a==b){
cout<<"infinity";
}
else if(a<b){
cout<<0;
}
else{
int x=0;
for(int i=1;i*i<=(a-b);i++){
if((a-b)%i==0){
int y=(a-b)/i;
if(i>b){
x++;
}
if(y>b && y!=i){
x++;
}
}
}
cout<<x;
}
return 0;
}
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