
    Given the total number of bus stops on a route, calculate the sum of all possible checkpoint combinations where buses can be strategically placed for efficient route segmentation. Each checkpoint must divide the total number of stops evenly to ensure consistent spacing and optimal passenger distribution throughout the route.
    

    
def sum_div(number):
    """
    Given the total number of bus stops on a route, calculate the sum of all possible checkpoint combinations where buses can be strategically placed for efficient route segmentation. Each checkpoint must divide the total number of stops evenly to ensure consistent spacing and optimal passenger distribution throughout the route.
    

    """
def sum_div(number):
    """
    Given the total number of bus stops on a route, calculate the sum of all possible checkpoint combinations where buses can be strategically placed for efficient route segmentation. Each checkpoint must divide the total number of stops evenly to ensure consistent spacing and optimal passenger distribution throughout the route.
    

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