
#include<stdio.h>

int count=0;
{
	int a,b,c,i,;
	int count = 0;
	scanf("%d %d %d", &a, &b, &c);
		for (i=a; i<= b; i++){
			if(c%i == 0)++;{
				count++
		}
	}
	printf("%d\n",count);
	
    return 0;
}