#include using namesp

#include  using namespace std;int n, i, ans;int gcd(int a, int b){\tif (a % b == 0) \t\treturn b;\telse\t\treturn gcd(b, a%b);}int main(){\tcin>>n; \tans = 0;\tfor (i = 1; i <= n; i  ) \t\tif (gcd(n,i) == i)\t\t\tans  ; \tcout<
输入：120 
输出：