擅长:python、mysql、java
<p>这不需要花费时间:</p>
<pre><code>def gcd(a, b):
if (b == 0): return a
else: return gcd(b, a%b)
def lcm(a, b):
return abs(a*b) / gcd(a, b)
def euler5(n):
if (n == 1): return 1
else: return lcm(n, euler5(n-1))
print euler5(20)
</code></pre>