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Cod sursa(job #196201)
#include <stdio.h>
long nr, j, a, b, rez, sum, SUM, i, puteri[60000], exp[60000];
int main()
{
freopen ("sumdiv.in", "rt", stdin);
freopen ("sumdiv.out", "wt", stdout);
scanf("%ld %ld", &a, &b);
for (i = 2; i <= a; ++i)
{
if (a % i == 0)
{
puteri[++puteri[0]] = i;
while (a % i == 0)
{
++exp[++exp[0]];
a /= i;
}
exp[exp[0]] *= b;
}
}
for (i = 1; i <= puteri[0]; ++i)
{
sum = 1;
nr = 1;
for (j = 1; j <= exp[i]; ++j)
{
sum += (nr * puteri[i]) % 9901;
nr *= puteri[i];
}
SUM += (sum % 9901);
}
SUM %= 9901;
printf("%ld\n", SUM);
return 0;
}