题解 | 牛牛的二三七整除

num = int(input())
div_list1 = []
div_list2 = [2, 3, 7]


def compute(num, div_list1, div_list2):
    for div_num in div_list2:
        if num % div_num == 0:
            div_list1.append(div_num)
        
    if not div_list1:
        return "n"
    
    else:
        return sorted(div_list1)

result = compute(num, div_list1, div_list2)
if result == 'n':
    print(result)
else:
    print(*result) #解包