The book is now available! 267
(another Prime Pages' Curiosity)
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267 = pi(2)*phi(2)*sigma(2) + pi(6)*phi(6)*sigma(6) + pi(7)*phi(7)*sigma(7). Note that 267 is the only number with this property. [Firoozbakht]

 

  Submitted: 2004-09-20 10:08:18;   Last Modified: 2008-01-30 11:28:00.



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