OFFSET
1,2
LINKS
Donovan Johnson, Table of n, a(n) for n = 1..1000
EXAMPLE
n = 89767, sigma(n) = 89768, phi(n) = 89766.
MATHEMATICA
Select[Range[25000], Union[IntegerDigits[#]] == Union[ IntegerDigits[ DivisorSigma[ 1, #]]] == Union[IntegerDigits[EulerPhi[#]]]&] (* Harvey P. Dale, Jun 12 2014 *)
PROG
(PARI) c=0; for(n=1, 324773, m=n; nd=vector(10); for(j=1, 6, r=m%10; nd[r+1]=1; m=m\10; if(m==0, j=6)); s=sigma(n); m=s; sd=vector(10); for(j=1, 6, r=m%10; sd[r+1]=1; m=m\10; if(m==0, j=6)); for(j=1, 10, if(nd[j]<>sd[j], next(2))); p=eulerphi(n); m=p; pd=vector(10); for(j=1, 6, r=m%10; pd[r+1]=1; m=m\10; if(m==0, j=6)); for(j=1, 10, if(nd[j]<>pd[j], next(2))); c++; write("b082059.txt", c " " n)) \\ Donovan Johnson, Feb 28 2013
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Labos Elemer, Apr 04 2003
STATUS
approved