A329858 - cp's OEIS frontend

A329858 Numbers k such that k and usigma(k) have the same set of prime divisors, where usigma(k) is the sum of unitary divisors of k (A034448).

n	a(n)
1	1
2	6
3	24
4	60
5	90
6	180
7	360
8	378
9	816
10	1056
11	1512
12	3780
13	9100
14	10500
15	12240
16	13230
17	15750
18	15840
19	26460
20	31500
21	36750
22	40950
23	46494
24	51408
25	52920
26	63000
27	63700
28	66528
29	73500
30	87360
31	94500
32	95550
33	110250
34	145600
35	145920
36	147000
37	163800
38	181632
39	185976
40	220500

[1, 6, 24, 60, 90, 180, 360, 378, 816, 1056, 1512, 3780, 9100, 10500, 12240, 13230, 15750, 15840, 26460, 31500, 36750, 40950, 46494, 51408, 52920, 63000, 63700, 66528, 73500, 87360, 94500, 95550, 110250, 145600, 145920, 147000, 163800, 181632, 185976, 220500]

cp's OEIS Frontend

A329858 Numbers k such that k and usigma(k) have the same set of prime divisors, where usigma(k) is the sum of unitary divisors of k (A034448).

Table of values

List of values