import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner stdn = new Scanner(System.in);

		int a = stdn.nextInt();
		int b = stdn.nextInt();
		int c = stdn.nextInt();
		int flg = 0;
		
		for( ; a <= b; a++){
			if(c % a == 0){
				flg++;
			}
		}
		System.out.println(flg);
	}
}
/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