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A086487 Smallest number with n prime divisors such that the sum of the prime divisors is also a divisor, or 0 if no such number exists. 4
2, 0, 30, 1122, 2730, 72930, 870870, 9699690, 340510170, 9592993410, 265257422430, 8624101075590, 304250263527210, 14299762385778870, 1164365758518632670, 43657174563782890110, 1987938667108592728530 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

First member of A086486 with n distinct prime factors. A001221(a(n)) = n; A008472(a(n)) divides a(n). - David Wasserman, Mar 09 2005

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

a(3) = 30. The prime divisors of 30 are 2,3 and 5 and 2+3+5 = 10, divides 30.

CROSSREFS

Cf. A086486, A086488.

Cf. A001221, A008472, A104465, A104466.

Sequence in context: A007218 A092177 A104466 * A071147 A156481 A176726

Adjacent sequences:  A086484 A086485 A086486 * A086488 A086489 A086490

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Jul 28 2003

EXTENSIONS

More terms from David Wasserman, Mar 09 2005

STATUS

approved

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Last modified July 21 19:22 EDT 2019. Contains 325199 sequences. (Running on oeis4.)