cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A191580 Numbers n for which the sum of their prime factors (with repetition) divides the sum of their anti-divisors.

Table of values

n a(n)
1 5
2 10
3 40
4 41
5 129
6 135
7 140
8 155
9 182
10 189
11 200
12 204
13 206
14 238
15 375
16 429
17 435
18 441
19 455
20 475
21 546
22 564
23 574
24 616
25 625
26 678
27 722
28 744
29 765
30 836
31 856
32 902
33 1035
34 1056
35 1170
36 1188
37 1272
38 1296
39 1344
40 1518
41 1650
42 1764
43 1806
44 1918
45 1925

List of values

[5, 10, 40, 41, 129, 135, 140, 155, 182, 189, 200, 204, 206, 238, 375, 429, 435, 441, 455, 475, 546, 564, 574, 616, 625, 678, 722, 744, 765, 836, 856, 902, 1035, 1056, 1170, 1188, 1272, 1296, 1344, 1518, 1650, 1764, 1806, 1918, 1925]