Factors of $14$ are:

Given number is $14.$

We have to find the factors of the given number.

A number is said to be a factor of any other number, if it divides the second number completely without leaving any remainder.

Here,

$$\begin{gathered} 1 \times 14 = 14, \\ 2 \times 7 = 14, \\ 7 \times 2 = 14, \\ 14 \times 1 = 14 \end{gathered}$$ 

There is no remainder when $14$ is divided by $1, 2, 7 \mathrm{and} 14$. 

Therefore, the factors of $14$ are $1, 2, 7 \mathrm{and} 14$.

Hence, the correct answer is option A.