func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, m, as = 0;   template <class T>   void read(T &x) {     char ch;     bool ok;     for (ok = 0, ch = getchar(); !isdigit(ch); ch = getchar())       if (ch ==  - ) ok = 1;     for (x = 0; isdigit(ch); x = x * 10 + ch -  0 , ch = getchar())       ;     if (ok) x = -x;   }   int fp(int x, int y) {     int asi = 1;     while (y) {       if (y & 1) asi = 1ll * asi * x % 1000000007;       x = 1ll * x * x % 1000000007;       y >>= 1;     }     return asi;   }   int get_miu(int x) {     int asi = 1;     for (int i = (2), en = (x); i <= en; ++i) {       if (i * i > x) break;       if (x % i == 0) {         asi = 1000000007 - asi;         x /= i;         if (x % i == 0) return 0;       }     }     if (x != 1) asi = 1000000007 - asi;     return asi;   }   int main() {     read(n);     read(m);     if (m % n) {       puts( 0 );       return 0;     };     m /= n;     for (int i = (1), en = (m); i <= en; ++i) {       if (i * i > m) break;       if (m % i == 0) {         as = (as + 1ll * fp(2, m / i - 1) * get_miu(i) % 1000000007) % 1000000007;         if (i * i != m)           as = (as + 1ll * fp(2, i - 1) * get_miu(m / i) % 1000000007) %                1000000007;       }     }     printf( %d n , as);     return 0;   }   