MathDB
2012 ToT Spring Junior O p2 odd no of even positive divisors

Source:

March 4, 2020
number theoryDivisors

Problem Statement

The number 44 has an odd number of odd positive divisors, namely 11, and an even number of even positive divisors, namely 22 and 44. Is there a number with an odd number of even positive divisors and an even number of odd positive divisors?