def is_limited_factor_number(x):
   
    if x <= 0:
        return False
    
    for factor in [2, 3, 5]:
        while x % factor == 0:
            x //= factor
    
    return x == 1


print(is_limited_factor_number(30))  
print(is_limited_factor_number(14))  
print(is_limited_factor_number(6))  
print(is_limited_factor_number(60))  
print(is_limited_factor_number(7))