### Project Euler - Problem 30

**Description**

Surprisingly there are only three numbers that can be written as the sum of fourth powers of their digits:

- 1634 = 1^4 + 6^4 + 3^4 + 4^4
- 8208 = 8^4 + 2^4 + 0^4 + 8^4
- 9474 = 9^4 + 4^4 + 7^4 + 4^4
- As 1 = 1^4 is not a sum it is not included.

The sum of these numbers is 1634 + 8208 + 9474 = 19316. Find the sum of all the numbers that can be written as the sum of fifth powers of their digits.

**Solution**

let isNarcissistic num power =

let numAsString = num.ToString()

let arr = [for i=0 to (numAsString.Length - 1) do

yield (float(numAsString.Chars(i).ToString()))**power]

if num = int(List.sum arr) then

true

else

false

let GetAllNarcissistic =

[2..999999]

|> List.filter ( fun x -> isNarcissistic x 5.0 = true)

|> List.sum