Surprisingly there are only three numbers that can be written as the sum of fourth powers of their digits:
1634 = 14 + 64 + 34 + 44
8208 = 84 + 24 + 04 + 84
9474 = 94 + 44 + 74 + 44
As 1 = 14 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.
int sum = 0; String temp = ""; int tempresult = 0; for (int i = 0; i < 236196; i++) { temp = Integer.toString(i); for (int j = 0; j < temp.length(); j++) { tempresult += Math.pow(Integer.parseInt(String.valueOf(temp.charAt(j))), 5); } if (tempresult == i && !(i==0||i==1)) { System.out.println(i); sum += i; } tempresult = 0; } System.out.println("Ergebnis:" + sum);
Lösung: 443839