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.

2, 0, 30, 1122, 2730, 72930, 870870, 9699690, 340510170, 9592993410, 265257422430, 8624101075590, 304250263527210, 14299762385778870, 1164365758518632670, 43657174563782890110, 1987938667108592728530

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: A345762 A340534 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