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A254009
Numbers that divide the sum of the reverse of their aliquot parts (A069250).
1
1, 6, 244, 285, 944, 1242, 3738, 22644, 37686, 58950, 85512, 124944, 130410, 133857, 235644, 3202101, 5367582, 5663697, 45165231, 141635817, 214939686, 736140702, 2395863144, 4992033177, 28406362140, 30364415451
OFFSET
1,2
COMMENTS
A072228 is a subsequence. - Paolo P. Lava, Nov 09 2018
EXAMPLE
Aliquot parts of 944 are 1, 2, 4, 8, 16, 59, 118, 236, 472 and the sum of their reverse is 1 + 2 + 4 + 8 +61 + 95 + 811 + 632 + 274 = 1888. Finally, 1888 / 944 = 2.
MAPLE
with(numtheory):
T:=proc(w) local x, y, z; x:=w; y:=0;
for z from 1 to ilog10(x)+1 do y:=10*y+(x mod 10); x:=trunc(x/10); od; y; end:
P:=proc(q) local a, b, k; global n;
for n from 1 to q do a:=sort([op(divisors(n))]); b:=add(T(a[k]), k=1..nops(a)-1);
if type(b/n, integer) then print(n); fi; od; end: P(10^9);
PROG
(PARI) isok(n) = (sumdiv(n, d, (d != n)* eval(concat(Vecrev(Str(d))))) % n) == 0; \\ Michel Marcus, Feb 27 2015
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Paolo P. Lava, Jan 22 2015
EXTENSIONS
a(16)-a(26) from Lars Blomberg, Feb 27 2015
STATUS
approved