import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int yaku=0;
for(;a==b;a++){
if(c%a==0){
	yaku ++;
}

}
System.out.println(yaku);
}

}

