A081377 - cp's OEIS frontend

A081377 Numbers n such that the set of prime divisors of phi(n) is equal to the set of prime divisors of sigma(n).

n	a(n)
1	1
2	3
3	14
4	35
5	42
6	70
7	105
8	119
9	209
10	210
11	238
12	248
13	297
14	357
15	418
16	477
17	594
18	595
19	616
20	627
21	714
22	744
23	954
24	1045
25	1178
26	1190
27	1240
28	1254
29	1463
30	1485
31	1672
32	1674
33	1736
34	1785
35	1848
36	1863
37	2079
38	2090
39	2376
40	2385
41	2540
42	2728
43	2926
44	2945
45	2970
46	3080
47	3135
48	3302

[1, 3, 14, 35, 42, 70, 105, 119, 209, 210, 238, 248, 297, 357, 418, 477, 594, 595, 616, 627, 714, 744, 954, 1045, 1178, 1190, 1240, 1254, 1463, 1485, 1672, 1674, 1736, 1785, 1848, 1863, 2079, 2090, 2376, 2385, 2540, 2728, 2926, 2945, 2970, 3080, 3135, 3302]

cp's OEIS Frontend

A081377 Numbers n such that the set of prime divisors of phi(n) is equal to the set of prime divisors of sigma(n).

Table of values

List of values