#include <stdio.h>

int main(void){
????????int a,b,c,i;
    i = 0;
????????scanf("%d %d %d",&a,&b,&c);
????????while(a != b){
??????      ??if(c % a == 0){
                i++;
                }
          a++;
????????}
    printf("%d\n",i);
????????return 0;
}