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Palindromic Quasi_Over_Squares
rood Palindromic Quasi_Over_Squares rood comments


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F_qs Decomposition of the quasi_over_square in its prime factors. Date Date of discovery by the author. blue Hypertext links to related topics in number theory Comm Comments about the palindromic Quasi_Over_Square number.


Factorizations

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F_qs  30.103 =
      PRIME

Comm 30103 is the only known multi-digit palindromic prime of the form sigma(n)/d(n), when n is composite. ( McCranie and Honaker ) sigma(n) = the sum of all the factors of n, including 1 and n itself. d(n) = the number of factors of n, including 1 and n itself. 30103 is also nice because it comes up for n = 149645 (an odd number) and once for n = 179574 (an even number). n sigma(n) d(n) sigma(n)/d(n)=palprime 149645 180618 6 30103 179574 361236 12 30103 30103 is still the only "known" palprime with the property.

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