A325020 - cp's OEIS frontend

A325020 Numbers m such that m*(m-tau(m))/sigma(m) is an integer h where k-tau(k) is the number of nondivisors of k (A049820) and sigma(k) is the sum of the divisors of k (A000203).

n	a(n)
1	1
2	2
3	6
4	22
5	28
6	76
7	84
8	90
9	96
10	170
11	216
12	248
13	252
14	496
15	520
16	532
17	588
18	672
19	700
20	852
21	864
22	1240
23	2176
24	2448
25	2480
26	2812
27	3360
28	6048
29	7392
30	7584
31	8128
32	9120
33	11480
34	12616
35	12768
36	13832
37	14056
38	14720
39	15456
40	19488
41	20536
42	21216
43	27000
44	30240
45	31584
46	31968

[1, 2, 6, 22, 28, 76, 84, 90, 96, 170, 216, 248, 252, 496, 520, 532, 588, 672, 700, 852, 864, 1240, 2176, 2448, 2480, 2812, 3360, 6048, 7392, 7584, 8128, 9120, 11480, 12616, 12768, 13832, 14056, 14720, 15456, 19488, 20536, 21216, 27000, 30240, 31584, 31968]

cp's OEIS Frontend

A325020 Numbers m such that m*(m-tau(m))/sigma(m) is an integer h where k-tau(k) is the number of nondivisors of k (A049820) and sigma(k) is the sum of the divisors of k (A000203).

Table of values

List of values