
    Given a client's monthly income, calculate the sum of all possible payment amounts that could be regularly deducted without leaving any remainder, to help determine optimal savings and investment plans. The payment amounts must be positive integers that evenly divide into the monthly income, and the sum should include the monthly income itself.
    

    
def sum_div(number):
    """
    Given a client's monthly income, calculate the sum of all possible payment amounts that could be regularly deducted without leaving any remainder, to help determine optimal savings and investment plans. The payment amounts must be positive integers that evenly divide into the monthly income, and the sum should include the monthly income itself.
    

    """
def sum_div(number):
    """
    Given a client's monthly income, calculate the sum of all possible payment amounts that could be regularly deducted without leaving any remainder, to help determine optimal savings and investment plans. The payment amounts must be positive integers that evenly divide into the monthly income, and the sum should include the monthly income itself.
    

    """
    divisors = [1]
    for i in range(2, number):
        if number % i == 0:
            divisors.append(i)
    return sum(divisors)