A323781 - cp's OEIS frontend

A323781 Numbers m such that Sum_{d|m} (tau(d)/sigma(d)) is an integer h where tau(k) = the number of the divisors of k (A000005) and sigma(k) = the sum of the divisors of k (A000203).

n	a(n)
1	1
2	15
3	429
4	609
5	6003
6	9156
7	20943
8	75579
9	90252
10	93849
11	115773
12	331359
13	631764
14	744993
15	817191
16	837655
17	925083
18	1130766
19	1141191
20	2349087
21	2491740
22	2512965
23	3040728
24	3266253
25	3796143
26	4314891
27	4365231
28	5025930
29	5294340
30	6135624
31	6629271
32	7210671
33	10906175

[1, 15, 429, 609, 6003, 9156, 20943, 75579, 90252, 93849, 115773, 331359, 631764, 744993, 817191, 837655, 925083, 1130766, 1141191, 2349087, 2491740, 2512965, 3040728, 3266253, 3796143, 4314891, 4365231, 5025930, 5294340, 6135624, 6629271, 7210671, 10906175]

cp's OEIS Frontend

A323781 Numbers m such that Sum_{d|m} (tau(d)/sigma(d)) is an integer h where tau(k) = the number of the divisors of k (A000005) and sigma(k) = the sum of the divisors of k (A000203).

Table of values

List of values