原题链接 http://projecteuler.net/problem=34

Digit factorials

145 is a curious number, as 1! + 4! + 5! = 1 + 24 + 120 = 145.

Find the sum of all numbers which are equal to the sum of the factorial of their digits.

Note: as 1! = 1 and 2! = 2 are not sums they are not included.

数字的阶乘

145是一个特殊的数字，因为1! + 4! + 5! = 1 + 24 + 120 = 145.

求所有满足数的每位数的阶乘之和等于数本身这个条件的数的和
注意：因为1！= 1 和 2！= 2不是和，所以没有被包括进来。