OFFSET
1,10
LINKS
Naohiro Nomoto, In the list of divisors of n,...
EXAMPLE
Divisors of 20345 are (1,20345), the numbers of digits are [0(1),1(1),2(1),3(1),4(1),5(1)], so a(1) = 1.
Divisors of 45050 are (1,2,3,10,4505,13414,22323,45050), the numbers of digits (0-5) are [0(4),1(4),2(4),3(4),4(4),5(4)], so a(10) = 4.
MAPLE
isA045816 := proc(n) local c, j, b, h, a ; a := [0, 0, 0, 0, 0, 0] : c := numtheory[divisors](n): for j from 1 to nops(c) do b := convert(c[j], base, 6); for h from 1 to nops(b) do a[b[h]+1] := a[b[h]+1]+1: end do: end do: if(a[1]=a[2] and a[2]=a[3] and a[3]=a[4] and a[4]=a[5] and a[5]=a[6]) then a[1] ; else -1 ; end if: end: n := 1: while true do a := isA045816(n) : if a >= 0 then printf("%d, ", a) ; fi ; n := n+1 : od : # R. J. Mathar, Jun 26 2007
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
EXTENSIONS
More terms from Sean A. Irvine, Sep 26 2011
STATUS
approved