Prime factors of ********** are
3^9 x 5^6 x 7^3.
Since there are no powers of 2 here all the factors of this number will be odd.
The number of factors is given by the product of the highest exponent of each prime factors + 1.
In this case (9 + 1)×(6 + 1)×(3 + 1) = 280.
