Factorion
= Factorion
{wiki=Factorion}
A **factorion** is a special type of number in mathematics that is equal to the sum of the factorials of its digits. In other words, a number \\( n \\) is a factorion if: \\\[ n = d_1! + d_2! + d_3! + \\ldots + d_k! \\\] where \\( d_1, d_2, \\ldots, d_k \\) are the digits of \\( n \\), and \\( !