Sum of LCM digits

>>> def gcd (a, b):
        while b > 0:
            temp = b
            b = a % b
            a = temp
        return a
>>> def lcm (a, b):
        return a * (b / gcd (a, b))
>>> temp = 2
>>> for x in xrange (3, 31):
        temp = lcm (temp, x)
>>> sum(int(x) for x in str(temp))
54

from fractions import *
def lcm(x,y):
    k=(x*y)/gcd(x,y)
    return k
a=1
b=2
while(b<31):
    c=lcm(a,b)
    b+=1
    a=c
def digitalsum(x):
    """Returns sum of digits of the number"""
    if x<10:
        return x
    else:
        return (x%10)+digitalsum(x//10)
digitalsum(c)

public static void main(String args[]){
    double x = 1;
    for(double i = 1; i <= 30; i++)
        x = lcm(x, i);
    System.out.println(x); //prints the LCM
}

private static long lcm(long a, long b){
    return a * (b / gcd(a, b));
}

private static long gcd(long a, long b){
    while (b > 0) {
        long temp = b;
        b = a % b; // % is remainder
        a = temp;
    }
    return a;
}