Let's denote *d*(*n*) as the number of divisors of a positive integer *n*. You are given three integers *a*, *b* and *c*. Your task is to calculate the following sum:

Find the sum modulo 1073741824 (2<sup class="upper-index">30</sup>).
The first line contains three space-separated integers *a*, *b* and *c* (1 ≤ *a*, *b*, *c* ≤ 100).
import math
a,b,c=map(int,input().split())
h=[0]+[1]*(a*b*c)
print(h)
for i in range(2,len(h)) :
    j=i
    while j<len(h) :
        h[j]+=1
        j+=i
o=0
for i in range(1,a+1) :
    for j in range(1,b+1) :
        for k in range(1,c+1) :
            o+=h[i*j*k]
print(o)