👉 In mathematics, a positive integer is called an "integer" if it can be expressed as a fraction of two integers. The set of all positive integers, denoted by $\mathbb{Z}$, is often referred to as the set of natural numbers or the counting number system. A positive integer $n$ is said to be the "proportional part" of another integer $m$, if there exists an integer $k$ such that $mn = k^2$. This means
