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Posts: 154
Happy Perfect Number Day!
Posted by
Shardik the Baron (aka BaronWasteland)
Jun 28 '17, 05:52
A perfect number is equal to the sum of its proper factors. The first two are
6 = 1 + 2 + 3
and
28 = 1 + 2 + 4 + 7 + 14
I leave the calculation of the third as an exercise for the reader. Hint: all known perfect numbers end in 6 or 28.
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