import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scan=new Scanner(System.in);
int a=scan.nextInt();
int b=scan.nextInt();
int c=scan.nextInt();
int d=0;
do{
	if(c%a==0){
		d++;
	}
	a++;
	if(a>b)break;
}while(true);
System.out.println(d);
scan.close();
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz