@[Pandingding](/user/722468) i-1 不一定有逆元，所以要特判
```cpp
#include<bits/stdc++.h>
using namespace std;
long long a,ans=1,b,cnt,i;
long long pw(long long a,long long b)
{
long long f=a%9901,x=1,y=b;
while(y)
{
if(y&1)
x=x*f%9901;
f=f*f%9901;
y>>=1;
}
return x;
}
int main()
{
scanf("%lld%lld",&a,&b);
if(!a)
{
printf("0");
return 0;
}
if(a==1||!b)
{
printf("1");
return 0;
}
for(i=2;i<=a;++i)
{
cnt=1;
while(!(a%i))
{
cnt+=b;
a/=i;
}
if(cnt>=2)
if(i%9901!=1)
ans=ans*(pw(i,cnt)+9900)%9901*pw(i-1,9899)%9901;
else
ans=ans*cnt%9901;
}
printf("%lld",ans);
return 0;
}
```
by 5k_sync_closer @ 2023-06-29 15:32:32
@[5k_sync_closer](/user/388651) 谢谢，此帖结。
by Pandingding @ 2023-06-29 15:34:42