p =
n a(n) factorization of p^6 - 1 tau(p^6 - 1)
-- ---- --------------------------------- ------------
1 2 3^2 * 7 6
2 3 2^3 * 7 * 13 16
3 5 2^3 * 3^2 * 7 * 31 48
4 7 2^4 * 3^2 * 19 * 43 60
5 11 2^3 * 3^2 * 5 * 7 * 19 * 37 192
6 13 2^3 * 3^2 * 7 * 61 * 157 96
7 17 2^5 * 3^3 * 7 * 13 * 307 192
8 19 2^3 * 3^3 * 5 * 7^3 * 127 256
9 23 2^4 * 3^2 * 7 * 11 * 13^2 * 79 360
10 41 2^4 * 3^2 * 5 * 7 * 547 * 1723 240
11 53 2^3 * 3^4 * 7 * 13 * 409 * 919 320
12 71 2^4 * 3^3 * 5 * 7 * 1657 * 5113 320
13 73 2^4 * 3^3 * 7 * 37 * 751 * 1801 320
14 167 2^4 * 3^2 * 7 * 83 * 9241 * 28057 240
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