import java.util.Scanner;

class Main{
	public static void main(String args[]){
	Scanner scan = new Scanner(System.in);
	int i,div = 0;
	int a = scan.nextInt();
	int b = scan.nextInt();
	int c = scan.nextInt();
	for(i = a;i <= b;i++){
		if(c % i == 0){
			div++;
		}
	}
	System.out.println(div);
	}
	
}
/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