def factors(n):
    result = []

    for i in range(1, n + 1):
        if n % i == 0:
            result.append(i)

    return result

print factors(10)
print factors(100)

[1, 2, 5, 10]
[1, 2, 4, 5, 10, 20, 25, 50, 100]