A321182 - cp's OEIS frontend

A321182 Composite numbers k such that sigma(k)/k' is an integer, where k' is the arithmetic derivative of k.

n	a(n)
1	15
2	35
3	45
4	95
5	119
6	143
7	209
8	287
9	319
10	323
11	377
12	527
13	559
14	693
15	779
16	899
17	923
18	989
19	1007
20	1189
21	1199
22	1343
23	1349
24	1763
25	1919
26	2159
27	2507
28	2759
29	2911
30	3239
31	3599
32	3827
33	4031
34	4607
35	5183
36	5207
37	5249
38	5459
39	5543
40	6439
41	6811
42	6887
43	7067
44	7279
45	7739
46	8159
47	8639
48	9179

[15, 35, 45, 95, 119, 143, 209, 287, 319, 323, 377, 527, 559, 693, 779, 899, 923, 989, 1007, 1189, 1199, 1343, 1349, 1763, 1919, 2159, 2507, 2759, 2911, 3239, 3599, 3827, 4031, 4607, 5183, 5207, 5249, 5459, 5543, 6439, 6811, 6887, 7067, 7279, 7739, 8159, 8639, 9179]

cp's OEIS Frontend

A321182 Composite numbers k such that sigma(k)/k' is an integer, where k' is the arithmetic derivative of k.

Table of values

List of values