#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

char rbuf[16];
#define RD(v) int v=0;{int _c;while(_c=*rp++-48,_c>=0)v=v*10+_c;}

char wbuf[11*200000];

#define MD 1000000007

long mp(long v,long b,long e){
	while(e){
		if(e&1) v=v*b%MD;
		b=b*b%MD;
		e>>=1;
	}
	return v;
}

main(){
	read(0,rbuf,sizeof rbuf);
	char*rp=rbuf;
	char*wp=wbuf+sizeof wbuf;
	RD(n);
	RD(m);
	++n;
	int x=m;
	for(;x+x>n+8;x-=4){
		*(long*)(wp-=8)=0x0a300a300a300a30l;
	}
	for(;x+x>n;--x){
		*--wp=10;
		*--wp=48;
	}
	for(;x;--x){
		long a=n/x;
		long b=n%x;
		long v=mp(mp(a-1,a+1,b),a,x-b-1);
		*--wp=10;
		while(*--wp=v%10+48,v/=10);
	}
	write(1,wp,(wbuf+sizeof wbuf)-wp);
	_exit(0);
}