#include <stdio.h>
??
int main(){
????int a,b,c,ans,i;
??
????scanf("%d%d%d",&a,&b,&c);

  ans=0:
  for(i=a;i<=b;i++){
   if(c%i==0){
      ans++;
    }

  }????

  printf("%d\n",ans);
????return 0;
}