A027896 Divisors of 10^11 - 1.
1, 3, 9, 21649, 64947, 194841, 513239, 1539717, 4619151, 11111111111, 33333333333, 99999999999
Offset: 1
Programs
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Mathematica
Divisors[10^11 - 1] (* Wesley Ivan Hurt, Jan 29 2017 *)
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PARI
divisors(10^11-1) \\ Charles R Greathouse IV, Jun 21 2017