id:A116974 - OEIS Search Results

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Numbers n for which the sum of the proper divisors equals the product of the proper divisors.

+0
1

2, 3, 5, 6, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`Union of 6 and A000040: the prime numbers.`
	MATHEMATICA	`fQ[n_] := Block[{id = Most@Divisors@n}, Plus @@ id == Times @@ id]; Select[Range@300, fQ@# &] (from Robert G. Wilson v (rgwv(at)rgwv.com), Apr 03 2006)`
	CROSSREFS	`Sequence in context: A096530 A003174 A053813 this_sequence A031402 A019438 A023798` `Adjacent sequences: A116971 A116972 A116973 this_sequence A116975 A116976 A116977`
	KEYWORD	`nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 01 2006`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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