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Cod sursa(job #391172)
#include <fstream>
using namespace std;
const int MOD = 9901;
ifstream fin ("sumdiv.in");
ofstream fout ("sumdiv.out");
int A, B, S = 1;
int pow(int x, long long p)
{
int sol = 1;
for(; p; p >>= 1)
{
if(p & 1)
sol = (sol * x) % MOD;
x = (x * x) % MOD;
}
return sol;
}
int main()
{
fin >> A >> B;
int a = A;
for(int i = 2; i*i <= A; ++i)
{
int p = 0;
while(a % i == 0)
a /= i, ++p;
if(p)
S *= (pow(i, 1LL*p*B+1)-1) * pow(i-1, MOD-2),
S %= MOD;
}
if(a > 1)
S *= (pow(a, B+1) - 1) * pow(a-1, MOD-2),
S %= MOD;
fout << S;
}