How do you compute the sum of the divisors of an integer in Sage?
Sage uses divisors(n)
for the number
(usually denoted
) of divisors of
and
sigma(n,k)
for the sum of the
powers of the
divisors of
(so
divisors(n)
and
sigma(n,0)
are the same). For example:
sage: divisors(28); sum(divisors(28)); 2*28 [1, 2, 4, 7, 14, 28] 56 56 sage: sigma(28,0); sigma(28,1); sigma(28,2) 6 56 1050
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