[seqfan] There are more terms in this sequence?

Claudio Meller claudiomeller at gmail.com
Thu Feb 3 16:37:41 CET 2011


There are more terms in this sequence?
Is good the title ?

Numbers that are equal to the sum of the squares of his first divisors

1, 130, 1860, 148840, 3039520

130 (1, 2, 5, 10) 1^2+2^2+5^2+10^2 = 1+4+25+100 = 130

1860 (1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30)

148480 (1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145,
160, 232)

3039520 (1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110
121, 157, 160, 176, 220, 242, 314, 352, 440, 484, 605, 628, 785, 880) 121,
157, 160, 176, 220, 242, 314, 352, 440, 484, 605, 628, 785, 880)

Thanks,
Claudio



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