
    Create a function that calculates all possible learning checkpoints for a student's personalized learning path based on their total performance score, where each checkpoint represents a divisor of their score. The sum of these checkpoints will determine the intensity and distribution of learning milestones throughout their educational journey.
    

    
def sum_div(number):
    """
    Create a function that calculates all possible learning checkpoints for a student's personalized learning path based on their total performance score, where each checkpoint represents a divisor of their score. The sum of these checkpoints will determine the intensity and distribution of learning milestones throughout their educational journey.
    

    """
def sum_div(number):
    """
    Create a function that calculates all possible learning checkpoints for a student's personalized learning path based on their total performance score, where each checkpoint represents a divisor of their score. The sum of these checkpoints will determine the intensity and distribution of learning milestones throughout their educational journey.
    

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