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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A280684 a(n) = number of divisors of the product of the divisors of n.

Table of values

n a(n)
1 1
2 2
3 2
4 4
5 2
6 9
7 2
8 7
9 4
10 9
11 2
12 28
13 2
14 9
15 9
16 11
17 2
18 28
19 2
20 28
21 9
22 9
23 2
24 65
25 4
26 9
27 7
28 28
29 2
30 125
31 2
32 16
33 9
34 9
35 9
36 100
37 2
38 9
39 9
40 65
41 2
42 125
43 2
44 28
45 28
46 9
47 2
48 126
49 4
50 28
51 9
52 28
53 2
54 65
55 9
56 65
57 9
58 9
59 2
60 637
61 2
62 9
63 28
64 22
65 9
66 125
67 2
68 28
69 9
70 125
71 2
72 247
73 2
74 9
75 28

List of values

[1, 2, 2, 4, 2, 9, 2, 7, 4, 9, 2, 28, 2, 9, 9, 11, 2, 28, 2, 28, 9, 9, 2, 65, 4, 9, 7, 28, 2, 125, 2, 16, 9, 9, 9, 100, 2, 9, 9, 65, 2, 125, 2, 28, 28, 9, 2, 126, 4, 28, 9, 28, 2, 65, 9, 65, 9, 9, 2, 637, 2, 9, 28, 22, 9, 125, 2, 28, 9, 125, 2, 247, 2, 9, 28]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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