A342662 - cp's OEIS frontend

A342662 a(n) = sigma(n) * A064989(n), where A064989 is multiplicative with a(2^e) = 1 and a(p^e) = prevprime(p)^e for odd primes p, and sigma is the sum of the divisors of n.

n	a(n)
1	1
2	3
3	8
4	7
5	18
6	24
7	40
8	15
9	52
10	54
11	84
12	56
13	154
14	120
15	144
16	31
17	234
18	156
19	340
20	126
21	320
22	252
23	456
24	120
25	279
26	462
27	320
28	280
29	690
30	432
31	928
32	63
33	672
34	702
35	720
36	364
37	1178
38	1020
39	1232
40	270
41	1554
42	960
43	1804
44	588
45	936
46	1368
47	2064
48	248
49	1425
50	837
51	1872
52	1078
53	2538
54	960
55	1512
56	600
57	2720
58	2070
59	3180
60	1008
61	3658
62	2784
63	2080
64	127

[1, 3, 8, 7, 18, 24, 40, 15, 52, 54, 84, 56, 154, 120, 144, 31, 234, 156, 340, 126, 320, 252, 456, 120, 279, 462, 320, 280, 690, 432, 928, 63, 672, 702, 720, 364, 1178, 1020, 1232, 270, 1554, 960, 1804, 588, 936, 1368, 2064, 248, 1425, 837, 1872, 1078, 2538, 960, 1512, 600, 2720, 2070, 3180, 1008, 3658, 2784, 2080, 127]

cp's OEIS Frontend

A342662 a(n) = sigma(n) * A064989(n), where A064989 is multiplicative with a(2^e) = 1 and a(p^e) = prevprime(p)^e for odd primes p, and sigma is the sum of the divisors of n.

Table of values

List of values