#include <stdio.h>
int main(void) {
int a,b,c,sum,e;
scanf("%d%d%d",&a
,&b
,&c
);
for(e=a,sum=0;e<=b;sum+=!(c%e++));
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CmludCBhLGIsYyxzdW0sZTsKCnNjYW5mKCIlZCVkJWQiLCZhLCZiLCZjKTsKCmZvcihlPWEsc3VtPTA7ZTw9YjtzdW0rPSEoYyVlKyspKTsKcHJpbnRmKCIlZFxuIixzdW0pOwoJcmV0dXJuIDA7Cn0K