import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.*;
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 n = 0;
		int kazu = 0;
		for(int i= a;i<=b;i++){
			if (c%i == 0){
				kazu += 1;
			}
		}
		System.out.println(kazu);
	}
}
/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