题解，仅供学习

def find_divisors(c): 
    # 将输入的字符串转换为整数 
    c = int(c) 
     
    # 存储满足条件的k 
    divisors = [] 
     
    # 检查每个k是否能整除c 
    for k in range(2, 10): 
        if c % k == 0: 
            divisors.append(k)  
     
    # 输出结果 
    if divisors: 
        print(" ".join(map(str, divisors))) 
    else: 
        print("none") 
 
# 输入样例 
c = input() 
find_divisors(c)