%0 Journal Article %T A Divisor Function Inequality %A N. A. Carella %J Mathematics %D 2009 %I arXiv %X This short note provides an unconditional proof of a well known inequality of the divisor function. This is an unsolved problem in pure mathematics and the distribution of prime numbers. Furthermore, the technique is completely elementary. %U http://arxiv.org/abs/0912.1866v4