A334784 - cp's OEIS frontend

A334784 a(n) = Sum_{d|n} lcm(tau(d), sigma(d)).

n	a(n)
1	1
2	7
3	5
4	28
5	7
6	23
7	9
8	88
9	44
10	49
11	13
12	128
13	15
14	39
15	35
16	243
17	19
18	140
19	21
20	112
21	45
22	55
23	25
24	308
25	100
26	105
27	84
28	228
29	31
30	161
31	33
32	369
33	65
34	133
35	63
36	1064
37	39
38	87
39	75
40	532
41	43
42	183
43	45
44	160
45	152
46	103
47	49
48	1083
49	66
50	328
51	95
52	420
53	55
54	300
55	91
56	408
57	105
58	217
59	61
60	476

[1, 7, 5, 28, 7, 23, 9, 88, 44, 49, 13, 128, 15, 39, 35, 243, 19, 140, 21, 112, 45, 55, 25, 308, 100, 105, 84, 228, 31, 161, 33, 369, 65, 133, 63, 1064, 39, 87, 75, 532, 43, 183, 45, 160, 152, 103, 49, 1083, 66, 328, 95, 420, 55, 300, 91, 408, 105, 217, 61, 476]

cp's OEIS Frontend

A334784 a(n) = Sum_{d|n} lcm(tau(d), sigma(d)).

Table of values

List of values