import java.util.ArrayList;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO ?????????????????????????????????????????????
		ArrayList<String> ary = new ArrayList<String>();
		int a,b,c;
		int cnt = 0;
		Scanner sc = new Scanner(System.in);
//		sc.useDelimiter("\\r\\n");

		a = sc.nextInt();
		b = sc.nextInt();
		c = sc.nextInt();

		for(int i=a;i<=b;i++){
			if(c%i==0){
				cnt++;
			}
		}
		System.out.println(cnt);

		sc.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