A perfect square always has odd number of odd factors. A perfect square always has even number of even factors. The sum of all factors of a perfect square is always odd but if the sum of all factors of a number is odd, we cannot say that it must be a perfect square.

Therefore, the factors are 1, 2, 3, 4, 6, 9, 12, 18, and 36. Here, there is an odd number of factors because the square root of the perfect square (in this case 6) does not have a pair. Therefore, perfect squares have an odd number of factors because the square root of the perfect square does not have a pair.

The upcoming release of Call of Duty: Modern Warfare III is quickly approaching its November 10 PC launch date on Battle and Steam.

Can I Run Call of Duty: Modern Warfare? An Intel Core i5-2500 CPU is required at a minimum to run Call of Duty: Modern Warfare. However, the developers recommend a CPU greater or equal to an Intel Core i7-6700 to play the game. Provided that you have at least an AMD Radeon R9 380 graphics card you can play the game.