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Old 2021-06-14, 21:27   #1
sweety439
 
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Nov 2016

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Default A problem of Aliquot sum

Is 28 the only perfect number n for which no other number has Aliquot sum to n? (e.g. 6 = s(25), 496 = s(652), 8128 = s(10682) = s(10828))

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