import java.util.*;

class Main{
	public static void main(String args[]){

		Scanner scan = new Scanner(System.in);
		int num1 = scan.nextInt();
		int num2 = scan.nextInt();
		int num3 = scan.nextInt();
		int con = 0;
		int div = 0;
			
		do{
			if(num3 % (num1 + con) == 0) {
				div++;
			}
			else{}
			con++;
		}while(num1 + con <= num2);

		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