A259536 - cp's OEIS frontend

A259536 Numbers n such that sigma(n) - n = Sum_{k|n, k < n} sigma(k), where sigma(n) is the sum of the divisors of n and sigma(k) is the sum of the anti-divisors of k.

n	a(n)
1	14
2	20
3	42
4	45
5	52
6	55
7	121
8	377
9	451
10	4331
11	9211
12	18042
13	52093
14	58743
15	112853
16	143498
17	170322
18	182293
19	226118
20	289811
21	298489
22	394067
23	400831
24	456745
25	507678
26	541362
27	769667
28	929582
29	1132069
30	1150595
31	1218361
32	1230403
33	1262507
34	1431109
35	1516082
36	1875155

[14, 20, 42, 45, 52, 55, 121, 377, 451, 4331, 9211, 18042, 52093, 58743, 112853, 143498, 170322, 182293, 226118, 289811, 298489, 394067, 400831, 456745, 507678, 541362, 769667, 929582, 1132069, 1150595, 1218361, 1230403, 1262507, 1431109, 1516082, 1875155]

cp's OEIS Frontend

A259536 Numbers n such that sigma(n) - n = Sum_{k|n, k < n} sigma(k), where sigma(n) is the sum of the divisors of n and sigma(k) is the sum of the anti-divisors of k.

Table of values

List of values

cp's OEIS Frontend

A259536 Numbers n such that sigma(n) - n = Sum_{k|n, k < n} sigma*(k), where sigma(n) is the sum of the divisors of n and sigma*(k) is the sum of the anti-divisors of k.

Table of values

List of values

A259536 Numbers n such that sigma(n) - n = Sum_{k|n, k < n} sigma(k), where sigma(n) is the sum of the divisors of n and sigma(k) is the sum of the anti-divisors of k.