func C020() (interface{}, error) {
sum := 0
factorial := utils.Factorial(100)
for _, char := range factorial.String() {
num, _ := strconv.Atoi(string(char))
sum += num
}
return sum, nil
}
func C034() (interface{}, error) {
total := 0
for nb := 3; nb < 100000; nb++ {
factSum := big.NewInt(0)
for _, digit := range utils.NumberDigits(nb) {
factSum = factSum.Add(factSum, utils.Factorial(digit))
}
if strconv.Itoa(nb) == factSum.String() {
total += nb
}
}
return total, nil
}