A001157 - cp's OEIS frontend

A001157 a(n) = sigma_2(n): sum of squares of divisors of n.

n	a(n)
1	1
2	5
3	10
4	21
5	26
6	50
7	50
8	85
9	91
10	130
11	122
12	210
13	170
14	250
15	260
16	341
17	290
18	455
19	362
20	546
21	500
22	610
23	530
24	850
25	651
26	850
27	820
28	1050
29	842
30	1300
31	962
32	1365
33	1220
34	1450
35	1300
36	1911
37	1370
38	1810
39	1700
40	2210
41	1682
42	2500
43	1850
44	2562
45	2366
46	2650
47	2210
48	3410
49	2451
50	3255

[1, 5, 10, 21, 26, 50, 50, 85, 91, 130, 122, 210, 170, 250, 260, 341, 290, 455, 362, 546, 500, 610, 530, 850, 651, 850, 820, 1050, 842, 1300, 962, 1365, 1220, 1450, 1300, 1911, 1370, 1810, 1700, 2210, 1682, 2500, 1850, 2562, 2366, 2650, 2210, 3410, 2451, 3255]

cp's OEIS Frontend

A001157 a(n) = sigma_2(n): sum of squares of divisors of n.

Table of values

List of values