import java.util.Scanner;
class Main{
	
	Scanner sc = new Scanner(System.in);
	int a;
	int b;
	int c;
	int su=0;
	void rp4(){
	
		a = sc.nextInt();
		b = sc.nextInt();
		c = sc.nextInt();
		
		for(int i=a; i<=b; i++){
			if(c%i==0) su++;
		}
		System.out.println(su);
	}
	
	public static void main(String[]agrs){
		new Main().rp4();
	}
}
/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