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A049059
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Third element t of (-1)sigma sociable triple (r,s,t): s=(-1)sigma(r), t=(-1)sigma(s), r=(-1)sigma(t), where if x=Product p(i)^r(i), then (-1)sigma(x)=Product(-1+(Sum p(i)^s(i), s(i)=1 to r(i))).
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5
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OFFSET
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0,1
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COMMENTS
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LINKS
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EXAMPLE
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Factorizations 2^2*13, 2^2*3*13, 2^2*3*5*13, 2^5*3*13, 2^2*3*5*13*17, 2^9*3*13, 2^9*3*5*61
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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