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A107482
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Number of prime factors of the smallest n-perfect number.
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1
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OFFSET
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1,2
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COMMENTS
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Multiperfect numbers
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LINKS
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FORMULA
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EXAMPLE
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a(4)=10 because the smallest 4-perfect number factorization is 2^5*3^3*5*7 which has 10 prime factors.
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CROSSREFS
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KEYWORD
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hard,more,nonn
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AUTHOR
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Jose Brox (tautocrona(AT)terra.es), May 27 2005
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STATUS
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approved
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