A282775 - cp's OEIS frontend

A282775 Nonprime numbers k such that k | (sigma(k) - Sum_{j=1..m}{sigma(k) mod d_j}), where d_j is one of the m divisors of k.

n	a(n)
1	1
2	6
3	28
4	120
5	228
6	496
7	672
8	8128
9	30240
10	32760
11	125640
12	501888
13	523776
14	1207944
15	2178540
16	23569920
17	29720448
18	33550336
19	45532800
20	142990848
21	459818240
22	1379454720
23	1476304896
24	8589869056
25	14182439040
26	31998395520
27	43861478400
28	51001180160

[1, 6, 28, 120, 228, 496, 672, 8128, 30240, 32760, 125640, 501888, 523776, 1207944, 2178540, 23569920, 29720448, 33550336, 45532800, 142990848, 459818240, 1379454720, 1476304896, 8589869056, 14182439040, 31998395520, 43861478400, 51001180160]

cp's OEIS Frontend

A282775 Nonprime numbers k such that k | (sigma(k) - Sum_{j=1..m}{sigma(k) mod d_j}), where d_j is one of the m divisors of k.

Table of values

List of values