A051281 - cp's OEIS frontend

A051281 Sum of divisors of n, sigma(n) (A000203), is a power of number of divisors of n, d(n) (A000005).

n	a(n)
1	1
2	3
3	7
4	31
5	127
6	217
7	889
8	2667
9	3937
10	8191
11	27559
12	57337
13	131071
14	172011
15	253921
16	524287
17	917497
18	1040257
19	1777447
20	3670009
21	4063201
22	11010027
23	12189603
24	16252897
25	16646017
26	66584449
27	113770279
28	116522119
29	225735769
30	677207307
31	1073602561
32	2147483647
33	3612185689
34	4294434817
35	7515217927

[1, 3, 7, 31, 127, 217, 889, 2667, 3937, 8191, 27559, 57337, 131071, 172011, 253921, 524287, 917497, 1040257, 1777447, 3670009, 4063201, 11010027, 12189603, 16252897, 16646017, 66584449, 113770279, 116522119, 225735769, 677207307, 1073602561, 2147483647, 3612185689, 4294434817, 7515217927]

cp's OEIS Frontend

A051281 Sum of divisors of n, sigma(n) (A000203), is a power of number of divisors of n, d(n) (A000005).

Table of values

List of values