
    Design a function for a loan approval system that calculates the sum of all possible even monthly installment amounts that would perfectly divide a given loan amount, where each installment must be an even number. The resulting sum will be used as part of the loan's flexibility score to determine repayment options for borrowers.
    

    
import math

def sumofFactors(n):
    """
    Design a function for a loan approval system that calculates the sum of all possible even monthly installment amounts that would perfectly divide a given loan amount, where each installment must be an even number. The resulting sum will be used as part of the loan's flexibility score to determine repayment options for borrowers.
    

    """
import math

def sumofFactors(n):
    """
    Design a function for a loan approval system that calculates the sum of all possible even monthly installment amounts that would perfectly divide a given loan amount, where each installment must be an even number. The resulting sum will be used as part of the loan's flexibility score to determine repayment options for borrowers.
    

    """
    if n % 2 != 0:
        return 0
    res = 1
    for i in range(2, int(math.sqrt(n)) + 1):
        count = 0
        curr_sum = 1
        curr_term = 1
        while n % i == 0:
            count = count + 1
            n = n // i
            if i == 2 and count == 1:
                curr_sum = 0
            curr_term = curr_term * i
            curr_sum = curr_sum + curr_term
        res = res * curr_sum
    if n >= 2:
        res = res * (1 + n)
    return res