A125518 a(n) = tau(n) * prime(n).

2, 6, 10, 21, 22, 52, 34, 76, 69, 116, 62, 222, 82, 172, 188, 265, 118, 366, 134, 426, 292, 316, 166, 712, 291, 404, 412, 642, 218, 904, 254, 786, 548, 556, 596, 1359, 314, 652, 668, 1384, 358, 1448, 382, 1158, 1182, 796, 422, 2230, 681, 1374, 932, 1434, 482

Offset: 1

Author

Gary W. Adamson, Jan 21 2007

Keywords

• nonn
• easy

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..1000

Crossrefs

Row sums of A127641.

Cf. A000005 (tau), A000040 (prime).

Cf. A127640, A127638, A127639.

Programs

Mathematica

Table[DivisorSigma[0,n]Prime[n],{n,60}] (* Harvey P. Dale, Feb 19 2021 *)

PARI

a(n) = numdiv(n) * prime(n); \\ Andrew Howroyd, Aug 09 2018

Extensions

Name changed and terms a(15) and beyond from Andrew Howroyd, Aug 09 2018