28237
 13190
 39914
 81367
 8554
 61106
 67448
 39004
 22308
 16054
 71468
 60501
 100
 300
 59632
 90783
 5611
 1000
 69475
 69753
 10
 5
 582
 8
 36961
 5071
 20
 53213
 92775
 28738
 100000
 92280
 37944
 9
 2627
 7
 3

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#https://codeforces.com/contest/1062/problem/D
import math
n = int(input())
arr = [0] * (n+1)
for i in range(2,n+1):
	count = 0
	print("i:",i)
	for j in range(2, math.floor(i/2) +1):
		print(j)
		if (i%j == 0):
			score = int(i/j)
			if score !=1:
				count += 4 * score
	arr[i] = arr[i-1] + count
print(arr)
print(arr[-1])