#This function accepts a positive whole number and returns a list of all the number's factors in ascending order

def factors(number):
    factor_list = []
    for i in range (1, number + 1):
        if number % i == 0:
            factor_list.append(i)
            (factor_list.sort())

    return factor_list
print(factors(81))
print(factors(25))
print(factors(60))
print(factors(1))