Define is the sum of all positive divisors of (for example, ), find the smallest odd such that .
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Quick search using M a t h e m a t i c a
Select[Range@1000,DivisorSigma[1,#]>2#&&OddQ@#&]
returns 945
here are some more...
945, 1575, 2205, 2835, 3465, 4095, 4725, 5355, 5775, 5985, 6435, 6615, 6825, 7245, 7425, 7875, 8085, 8415, 8505, 8925, 9135, 9555, 9765
...