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Problems
Contests
National and Regional Contests
PEN Problems
PEN J Problems
13
13
Part of
PEN J Problems
Problems
(1)
J 13
Source:
5/25/2007
Determine all positive integers
k
k
k
such that
d
(
n
2
)
d
(
n
)
=
k
\frac{d(n^{2})}{d(n)}= k
d
(
n
)
d
(
n
2
)
=
k
for some
n
∈
N
n \in \mathbb{N}
n
∈
N
.
Divisor Functions