Math::NumSeq::DivisorCount -- how many divisors
use Math::NumSeq::DivisorCount; my $seq = Math::NumSeq::DivisorCount->new; my ($i, $value) = $seq->next;
The number of divisors of i, being 1,2,2,3,2,4,2, etc.
The sequence starts from i=1 and 1 is divisible only by itself. Then i=2 is divisible by 1 and 2. Or for example i=6 is divisible by 4 numbers 1,2,3,6.
See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence classes.
$seq = Math::NumSeq::DivisorCount->new ()
Create and return a new sequence object.
$value = $seq->ith($i)
Return the number of prime factors in
This calculation requires factorizing
$i and in the current code after small factors a hard limit of 2**32 is enforced in the interests of not going into a near-infinite loop.
$bool = $seq->pred($value)
Return true if
$value occurs as a divisor count, which simply means
$value >= 1.
Copyright 2011, 2012, 2013 Kevin Ryde
Math-NumSeq is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.
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