
    Given the total number of user interactions on a social media post, calculate the cumulative engagement threshold by finding the sum of all possible interaction breakpoints that evenly divide the total interaction count. This engagement score will be used to determine the post's visibility tier in the content moderation system.
    

    
def sum_div(number):
    """
    Given the total number of user interactions on a social media post, calculate the cumulative engagement threshold by finding the sum of all possible interaction breakpoints that evenly divide the total interaction count. This engagement score will be used to determine the post's visibility tier in the content moderation system.
    

    """
def sum_div(number):
    """
    Given the total number of user interactions on a social media post, calculate the cumulative engagement threshold by finding the sum of all possible interaction breakpoints that evenly divide the total interaction count. This engagement score will be used to determine the post's visibility tier in the content moderation system.
    

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