Highly Composite Number/Examples/2

Example of Highly Composite Number
$2$ is a highly composite number, being the smallest positive integer with $2$ divisors or more.

Proof
From Tau of Prime Number:
 * $\tau \left({2}\right) = 2$

From Tau Function of 1:
 * $\tau \left({1}\right) = 1$

That is, the only positive integer smaller than $2$ has a smaller number of divisors.

Thus, despite not actually being composite, $2$ is a highly composite number.