Sum of digits of factorial of a number

This is another projecteuler.net problem. This is again, very simple and gives programmers a chance to practice any new language they are learning. I wrote it in Python :)

#Problem 20
#Sum of digits in factorial

def fact(n):
    m = int(n/5)
    r = n - (m*5)
    i = 1
    f = 1
    while m > 0:
        m = m - 1
        f = f * i
        i = i + 1
        f = f * i
        i = i + 1
        f = f * i
        i = i + 1
        f = f * i
        i = i + 1
        f = f * i
        i = i + 1
        f = f / 10
    while r > 0:
        r = r - 1
        f = f * i
        i = i + 1
    return f

def digsum(n):
    s = 0
    while n > 0:
        s = s + (n%10)
        n = n/10
    return s

if __name__ == "__main__":
    n = int(raw_input("Enter n : "))
    f = fact(n)
    s = digsum(f)
    print f, s

Read the code carefully, while it is not perfect (100% correct though), there are many things to learn for newbie.