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Ingy döt Net 2013-04-10 14:58:50 -07:00
parent 2dd7375f96
commit 051504d65b
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13
Task/Arithmetic-Rational/Perl/arithmetic-rational.pl Normal file
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use bigrat;
foreach my $candidate (2 .. 2**19) {
my $sum = 1 / $candidate;
foreach my $factor (2 .. sqrt($candidate)+1) {
if ($candidate % $factor == 0) {
$sum += 1 / $factor + 1 / ($candidate / $factor);
}
}
if ($sum->denominator() == 1) {
print "Sum of recipr. factors of $candidate = $sum exactly ", ($sum == 1 ? "perfect!" : ""), "\n";
}
}