2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.
What is the smallest number that is evenly divisible by all of the numbers from 1 to 20?
能被1到20整除的数最小是多少？
from prime import Prime
def problem5():
pri = Prime(20)
#求pri.primes中所有元素的乘积
def mul(x, y): return x*y
max_power = reduce(mul, pri.primes, 1)
return max_power
if __name__=='__main__':
print str(problem5())
“能被1到20整除”也就是“能被1到20中的素数整除”，又一个与素数有关的问题