APL中的阶乘数字和(Project Euler 20)

import math

def factorial_digit_sum(n):
    # 计算 n 的阶乘
    factorial = math.factorial(n)
    
    # 将阶乘结果转换为字符串，逐位求和
    digit_sum = sum(int(digit) for digit in str(factorial))
    
    return digit_sum

# 计算 100! 的数字和
result = factorial_digit_sum(100)
print("The sum of the digits in the number 100! is:", result)

import java.math.BigInteger;

public class FactorialDigitSum {
    public static void main(String[] args) {
        int n = 100;
        BigInteger factorial = calculateFactorial(n);
        int digitSum = calculateDigitSum(factorial);
        
        System.out.println("The sum of the digits in the number " + n + "! is: " + digitSum);
    }

    private static BigInteger calculateFactorial(int n) {
        BigInteger result = BigInteger.ONE;
        for (int i = 2; i <= n; i++) {
            result = result.multiply(BigInteger.valueOf(i));
        }
        return result;
    }

    private static int calculateDigitSum(BigInteger number) {
        String numberStr = number.toString();
        int sum = 0;
        for (char c : numberStr.toCharArray()) {
            sum += Character.getNumericValue(c);
        }
        return sum;
    }
}