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A153824
Sum of proper divisors of n!: a(n) = sigma(n!) - n!.
+0
2
0, 0, 1, 6, 36, 240, 1698, 14304, 118800, 1118160, 11705288, 144092256, 1738439808, 24817158912, 355309325280, 5378578601760, 86081749397280, 1570394279039040, 28281459220193088, 572031558109589760, 11458497230555094720
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
AT&T Labs Research
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