A180464 a(n) is the smallest number m such that sigma(m)=46^n, or 0 if m does not exist.

1, 0, 0, 0, 0, 180217597, 6217507317, 325975026477, 15034820907837, 919684211139697, 31808042757482763, 1463508270300620883, 58746435953696315769, 2709539295335742607689, 138000408890542031957601, 5718143312090439006662949, 263735727094699893912217269

Offset

0,6

Links

Max Alekseyev, Table of n, a(n) for n = 0..100

Example

a(5)=180217597=7*25745371 and sigma(180217597)=(2^3)*(2^2*23^5)=2^5*23^5 and 180217597 is the smallest such number.

Crossrefs

Cf. A048251, A110077, A180265, A180460, A180461, A180462, A180463.

Sequence in context: A228760 A204529 A211239 * A179586 A234384 A226589

Adjacent sequences: A180461 A180462 A180463 * A180465 A180466 A180467

Keyword

nonn

Author

Walter Kehowski, Sep 06 2010

Extensions

Terms a(15) onward from Max Alekseyev, Mar 03 2014

Status

approved