A015707 - cp's OEIS frontend

A015707 Values of n where (phi(n) * sigma(n))/n is an integer and increases.

n	a(n)
1	1
2	6
3	18
4	24
5	28
6	40
7	54
8	72
9	96
10	117
11	135
12	196
13	200
14	216
15	224
16	288
17	360
18	384
19	468
20	496
21	600
22	640
23	756
24	775
25	864
26	891
27	1000
28	1080
29	1152
30	1372
31	1488
32	1521
33	1568
34	1701
35	1792
36	1944
37	2016
38	2160
39	2176
40	2480
41	2592
42	3100
43	3159
44	3200
45	3375
46	3456
47	3744
48	4320
49	4455
50	4608

[1, 6, 18, 24, 28, 40, 54, 72, 96, 117, 135, 196, 200, 216, 224, 288, 360, 384, 468, 496, 600, 640, 756, 775, 864, 891, 1000, 1080, 1152, 1372, 1488, 1521, 1568, 1701, 1792, 1944, 2016, 2160, 2176, 2480, 2592, 3100, 3159, 3200, 3375, 3456, 3744, 4320, 4455, 4608]

cp's OEIS Frontend

A015707 Values of n where (phi(n) * sigma(n))/n is an integer and increases.

Table of values

List of values