#!/usr/bin/perl

use strict;
use warnings;
use Data::Dumper;

my $hoh = {
          '3094507' => {
                         '2838413' => '22',
                         '2976790' => '33',
                         '539960' => '10',
                         '2152725' => '19',
                         '161546' => '5',
                         '2197572' => '3'
                       },
          '2946464' => {
                         '2952428' => '9',
                         '3913125' => '10',
                         '790014' => '2',
                         '1065575' => '3'
                       },
          '2565888' => {
                         '10538' => '1',
                         '744' => '2'
                       },
        };

my @results;

foreach my $outer (keys %$hoh) {
  foreach my $inner ($hoh->{$outer}) {
     my $max = 0;
     for (values %$inner) {
       $max = $_ if ($_ > $max);
     }
     push @results, $max;
  }
}

print Dumper(@results);

##</code><code>##

my $max = max (values %$inner);