# Author: Steven Carr
# Last Edited: October 2021

import stdio
import sys
# User input
n = int(sys.argv[1])
# For integer in range 2 to n (1 can only be divided by itself)
# Set total to 0
# for j in the range of 1 and i, if i is divisible by j,
# add j to the total and repeat until the total is equal
# to i.  Then output i.
for i in range(2, n+1):
    total = 0
    for j in range(1, i):
        if i % j == 0:
            total = total + j
    if total == i:
        stdio.writeln(i)