Divisor Sum of 15,472

Example of Sigma Function of Integer

 * $\map \sigma {15 \, 472} = 30 \, 008$

where $\sigma$ denotes the $\sigma$ function.

Proof
From Sigma Function of Integer:
 * $\ds \map \sigma n = \prod_{1 \mathop \le i \mathop \le r} \frac {p_i^{k_i + 1} - 1} {p_i - 1}$

where $n = \ds \prod_{1 \mathop \le i \mathop \le r} p_i^{k_i}$ denotes the prime decomposition of $n$.

We have that:
 * $15 \, 472 = 2^4 \times 967$

Hence: