Comment #2 on issue 4019 by [email protected]: divisors could use a 'pairs'
flag
http://code.google.com/p/sympy/issues/detail?id=4019
(modulo the conditional to take the middle element when the list has an odd
length)
Rather than another flag, should this just be called `divisor_pairs`?
def divisor_pairs(n):
"""return pairs of divisors of n, (a, b), such that a <= b. A generator
is
returned.
Examples
========
>>> from sympy import divisor_pairs
>>> list(divisor_pairs(24))
[(1,24),(2,12),(4,6),(3,8)]
"""
N = divisor_count(n)
d = divisors(n, generator=True)
for i in range((N + N%2)//2):
di = d.next()
yield tuple(sorted((di, n//di)))
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