Sum of Divisors is 8^3
comment by fabia on 2008-05-02 02:14:45
81999790080
comment by puzzles on 2008-05-02 03:03:41
N=2^7*3^7*5^7
comment by puzzles on 2008-05-02 05:33:42
21870000000 = 2^7*5^7*3^7
Sum of all possible divisors can be represented as
(1+2+2^2.....+2^7)*(1+3+3^2....+3^7)*(1+5+5^2....+5^7)
Sum of the above GPs are
(2^8-1)/(2-1)*(3^8-1)/(3-1)*(5^8-1)/(5-1)
=81679478400
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