To factored form the quadratic equation \( x^2 + 10x + 16 = 0 \), we need to find two numbers that multiply to \( 16 \) (the constant term) and add to \( 10 \) (the coefficient of \( x \)).
The two numbers that satisfy this are \( 2 \) and \( 8 \):
- \( 2 \times 8 = 16 \)
- \( 2 + 8 = 10 \)
Thus, the factored form of the equation is:
\[ (x + 2)(x + 8) = 0 \]
So, the numbers you are looking for are \( 2 \) and \( 8 \), where \( 2 \) is the lesser number.