A252997 - cp's OEIS frontend

A252997 Numbers n such that sigma(x) - x = n has at least two solutions, with each x having the same squarefree kernel, where sigma(x) is the sum of divisor function (A000203).

n	a(n)
1	218
2	189648
3	720240
4	119967120
5	129705984
6	517941905
7	707902440
8	1321744320
9	98890370304
10	99080219520
11	119922568640
12	139834382688
13	347612467648
14	580542318720
15	952717920000
16	1064902900320
17	1153644808680
18	2255573174400
19	3903820736256
20	6859688278905
21	10944640212480
22	14424196864000

[218, 189648, 720240, 119967120, 129705984, 517941905, 707902440, 1321744320, 98890370304, 99080219520, 119922568640, 139834382688, 347612467648, 580542318720, 952717920000, 1064902900320, 1153644808680, 2255573174400, 3903820736256, 6859688278905, 10944640212480, 14424196864000]

cp's OEIS Frontend

A252997 Numbers n such that sigma(x) - x = n has at least two solutions, with each x having the same squarefree kernel, where sigma(x) is the sum of divisor function (A000203).

Table of values

List of values