import java.io.*;
public class Main{
	public static void main(String[] args)throws Exception{
		BufferedReader input=new BufferedReader(new InputStreamReader(System.in));
		String str=input.readLine();
		String[] str2=str.split(" ");
		int a=Integer.parseInt(str2[0]);
		int b=Integer.parseInt(str2[1]);
		int c=Integer.parseInt(str2[2]);
		int ans=0;

		for(int i=a;i<b+1;i++){
			if(c%i==0){
			ans++;
			}
		}
		System.out.println(ans);
	}
}
/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