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A046710
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Irrational unitary-phi amicable numbers.
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1
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26640, 1038960, 1651680, 64415520, 7246080, 282597120, 844592855040, 32939121346560, 476734095360, 18592629719040, 124972029225861120, 486048526115143680, 2047588591705018859520, 79855955076495735521280
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,1
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COMMENTS
| Two numbers a and b are called irrational unitary-phi amicable numbers if they satisfy uphi(a)=uphi(b)=2*(a^2-b^2)^(1/2) where if x=Product p(i)^r(i) then uphi(x)=Product (p(i)^r(i)-1) (A047994).
Factorizations: 2^4*3^2*5*37, 2^4*3^3*13*5*37, 2^5*3^2*31*5*37, 2^5*3^3*13*31*5*37, ...
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CROSSREFS
| Cf. A046709.
Sequence in context: A107119 A206539 A015303 * A196937 A185774 A093180
Adjacent sequences: A046707 A046708 A046709 * A046711 A046712 A046713
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KEYWORD
| nonn
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AUTHOR
| Yasutoshi Kohmoto (zbi74583(AT)boat.zero.ad.jp)
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