#include <iostream>

using namespace std;
int divizor (int a , int b , int c)
{
    int nr=0,d=1;
    while(d<=a/2 && d<=b/2 && d<=c/2)
    {
        if(a%d==0 && b%d==0 && c%d==0)
        {
            nr++;
            d++
        }
        else
            d++;
    }
    return nr;
    }
    int main()
    {
        int a,b,c;
        cout<<"a=";cin>>a;
        cout<<"b=";cin>>b;
        cout<<"c=";cin>>c;
        cout<<divizor(a,b,c);
    }