import java.util.*;

class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		String[] list;
//		while(sc.hasNextLine()){
			list =sc.nextLine().split(" ");
//		}
		int a=Integer.parseInt(list[0]);
		int b=Integer.parseInt(list[1]);
		int c=Integer.parseInt(list[2]);
		
		int count=0;
		for(int i=a;i<=b;i++){
			if(c%i==0){
				count++;
			}
		}
		System.out.println(count);
	}
}
/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