import java.util.Scanner;

class Main{
	static public void main (String args[]){
		Scanner sc = new Scanner(System.in);
		sc.useDelimiter("\\s");
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int i = 0;

		while(true){
			if(c%a == 0){
				i++;
			}
			a++;
			if(a>b)
				break;
		}
		System.out.println(i);
	}
}
/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