A351447 - cp's OEIS frontend

A351447 Numbers k for which A003958(sigma(k)) = 2*A003958(k), where A003958 is multiplicative with a(p^e) = (p-1)^e and sigma is the sum of divisors function.

n	a(n)
1	2
2	98
3	120
4	136
5	312
6	520
7	672
8	888
9	1080
10	1120
11	1464
12	1480
13	1752
14	2440
15	2520
16	2808
17	2912
18	2920
19	3420
20	3768
21	3848
22	4632
23	5880
24	6048
25	6280
26	6344
27	6552
28	6648
29	6664
30	7512
31	7592
32	7720
33	7992
34	8181
35	8288
36	8892
37	9528
38	10104
39	10968
40	11080
41	12464
42	12520
43	12984
44	13176
45	13664
46	14712
47	15288

[2, 98, 120, 136, 312, 520, 672, 888, 1080, 1120, 1464, 1480, 1752, 2440, 2520, 2808, 2912, 2920, 3420, 3768, 3848, 4632, 5880, 6048, 6280, 6344, 6552, 6648, 6664, 7512, 7592, 7720, 7992, 8181, 8288, 8892, 9528, 10104, 10968, 11080, 12464, 12520, 12984, 13176, 13664, 14712, 15288]

cp's OEIS Frontend

A351447 Numbers k for which A003958(sigma(k)) = 2*A003958(k), where A003958 is multiplicative with a(p^e) = (p-1)^e and sigma is the sum of divisors function.

Table of values

List of values