What is the smallest perfect number?
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A perfect number is a positive integer that is equal to the sum of its proper positive divisors, excluding the number itself. Equivalently, a perfect number is a number that is half the sum of all of its positive divisors (including itself).
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Answers by country
6
28
2
128
answers
the Netherlands
17
Australia
31
Poland
2122
Switzerland
21
the United States
68
Pakistan
10
Canada
10
the United Kingdom
55
Germany
204
Austria
39
India
63