A279812 - cp's OEIS frontend

A279812 Let s(k) denote the sum of the even proper divisors of k. The sequence lists the pairs of numbers (x, y) such that s(x) = y and s(y) = x.

n	a(n)
1	440
2	568
3	2368
4	2420
5	5240
6	5848
7	10040
8	11128
9	12464
10	12736
11	21488
12	21712
13	24570
14	29190
15	34592
16	36832
17	126040
18	133856
19	133984
20	134190
21	139230
22	142290
23	152168
24	159500
25	175266
26	177460
27	200970
28	244530
29	244736
30	246304
31	248310
32	279630
33	283328
34	284620
35	306352
36	337460

[440, 568, 2368, 2420, 5240, 5848, 10040, 11128, 12464, 12736, 21488, 21712, 24570, 29190, 34592, 36832, 126040, 133856, 133984, 134190, 139230, 142290, 152168, 159500, 175266, 177460, 200970, 244530, 244736, 246304, 248310, 279630, 283328, 284620, 306352, 337460]

cp's OEIS Frontend

A279812 Let s(k) denote the sum of the even proper divisors of k. The sequence lists the pairs of numbers (x, y) such that s(x) = y and s(y) = x.

Table of values

List of values