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168 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) 168 = sigma(sigma(sigma(1+6+8))) and 1+6+8 =  (1*6*8). 168 is the only number with these two properties. [Firoozbakht]
Submitted: 2004-09-03 10:35:01; Last Modified: 2009-05-08 21:03:41.
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