Calculate factors from the first X numbers

print factors

#!/usr/bin/python

def factors(n):
	return set(reduce(list.__add__,([i, n//i] for i in range(1, int(n**0.5) + 1) if n % i == 0)))

def print_factors(f):
	for i in f:		
		print "%2s" % (i),
	print 


def calculate_factors(x):
	for i in range(1,x+1):
		f = sorted(list(factors(i)))[1:]
		print_factors(f)

calculate_factors(100)

By looking at the numbers with more factors than the previous numbers i discovered a nice sequence called Highly composite numbers