A104465 a(n) is the least k with n prime factors (counting multiplicity) such that the sum of these n factors divides k. First member of A036844 with n prime factors.

2, 4, 27, 16, 72, 240, 288, 256, 2688, 3840, 4608, 13824, 30720, 61440, 73728, 65536, 294912, 983040, 4325376, 5898240, 11010048, 15728640, 18874368, 141557760, 169869312, 654311424, 1107296256, 1006632960, 2818572288, 4026531840

Offset

1,1

Comments

A001222(a(n)) = n; A001414(a(n)) divides a(n).

Links

Table of n, a(n) for n=1..30.

Example

a(5) = 72 = 2*2*2*3*3; 2+2+2+3+3 = 12 divides 72.

Crossrefs

Cf. A001414, A001222, A036844, A086487.

Sequence in context: A358563 A189896 A095182 * A175759 A098515 A256451

Adjacent sequences: A104462 A104463 A104464 * A104466 A104467 A104468

Keyword

nonn,less

Author

David Wasserman, Mar 09 2005

Status

approved