A361581 - cp's OEIS frontend

A361581 If n is composite, replace n with the concatenation of its nontrivial divisors, written in decreasing order, each divisor being written in base 10 with its digits in reverse order, otherwise a(n) = n.

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	32
7	7
8	42
9	3
10	52
11	11
12	6432
13	13
14	72
15	53
16	842
17	17
18	9632
19	19
20	1542
21	73
22	112
23	23
24	2186432
25	5
26	312
27	93
28	41742
29	29
30	51016532
31	31
32	61842
33	113
34	712
35	75
36	812196432
37	37
38	912
39	313
40	2018542
41	41
42	12417632
43	43
44	221142
45	51953
46	322
47	47
48	42612186432
49	7
50	520152

[1, 2, 3, 2, 5, 32, 7, 42, 3, 52, 11, 6432, 13, 72, 53, 842, 17, 9632, 19, 1542, 73, 112, 23, 2186432, 5, 312, 93, 41742, 29, 51016532, 31, 61842, 113, 712, 75, 812196432, 37, 912, 313, 2018542, 41, 12417632, 43, 221142, 51953, 322, 47, 42612186432, 7, 520152]

cp's OEIS Frontend

A361581 If n is composite, replace n with the concatenation of its nontrivial divisors, written in decreasing order, each divisor being written in base 10 with its digits in reverse order, otherwise a(n) = n.

Table of values

List of values