A093859 Numbers whose sum of the digital products of the divisors is prime.

2, 4, 9, 11, 18, 21, 23, 29, 36, 41, 43, 45, 47, 58, 61, 67, 72, 75, 82, 85, 89, 90, 94, 115, 116, 122, 128, 130, 143, 144, 149, 150, 162, 163, 165, 167, 168, 170, 175, 178, 180, 185, 202, 206, 207, 209, 211, 213, 214, 218, 219, 223, 227, 229, 230, 233, 237, 243

Offset

1,1

Links

Table of n, a(n) for n=1..58.

Example

8842 is in the sequence because its divisors are [1, 2, 4421, 8842] and 1+2+(4*4*2*1)+(8*8*4*2) = 547, a prime.

Crossrefs

Sequence in context: A356181 A047348 A186699 * A266257 A115905 A292769

Adjacent sequences: A093856 A093857 A093858 * A093860 A093861 A093862

Keyword

base,easy,nonn

Author

Jason Earls, May 21 2004

Status

approved