A342924 - cp's OEIS frontend

A342924 Composite numbers k such that A003415(sigma(k)) = k + p*A003415(k), for some prime p, where A003415 is the arithmetic derivative, and sigma is the sum of divisors of n.

n	a(n)
1	6
2	28
3	120
4	496
5	672
6	963
7	1036
8	5871
9	8128
10	10479
11	164284
12	264768
13	523776
14	2308203
15	6511664
16	33550336
17	41240261
18	75384301
19	400902412
20	459818240
21	581013140
22	1253768516
23	1476304896
24	2114464203
25	8589869056

[6, 28, 120, 496, 672, 963, 1036, 5871, 8128, 10479, 164284, 264768, 523776, 2308203, 6511664, 33550336, 41240261, 75384301, 400902412, 459818240, 581013140, 1253768516, 1476304896, 2114464203, 8589869056]

cp's OEIS Frontend

A342924 Composite numbers k such that A003415(sigma(k)) = k + p*A003415(k), for some prime p, where A003415 is the arithmetic derivative, and sigma is the sum of divisors of n.

Table of values

List of values