#include <stdio.h>
??
int main(void) {
????????int a,b,c,i;
????????int count;
????????scanf("%d %d %d\n", &a, &b, &c);
????????for(i=a,count=0;i<=b;i++) {
????????????????if(c%i==0) count ++;
????????}
????????printf("%d\n", count);
??????????
????????return 0;
}