func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e6 + 100;   long long arr[N], d[N], tree[N << 2], mx[N << 2];   void build(int rt, int l, int r) {     if (l == r) {       tree[rt] = mx[rt] = arr[l];       return;     }     int m = (l + r) / 2;     build(rt << 1, l, m);     build(rt << 1 | 1, m + 1, r);     tree[rt] = tree[rt << 1] + tree[rt << 1 | 1];     mx[rt] = max(mx[rt << 1], mx[rt << 1 | 1]);   }   void update(int L, int R, int rt, int l, int r) {     if (mx[rt] <= 2) return;     if (l == r) {       tree[rt] = mx[rt] = d[tree[rt]];       return;     }     int m = (l + r) >> 1;     if (L <= m) update(L, R, rt << 1, l, m);     if (R > m) update(L, R, rt << 1 | 1, m + 1, r);     tree[rt] = tree[rt << 1] + tree[rt << 1 | 1];     mx[rt] = max(mx[rt << 1], mx[rt << 1 | 1]);   }   long long query(int L, int R, int rt, int l, int r) {     if (L <= l && r <= R) {       return tree[rt];     }     int m = (l + r) >> 1;     long long ans = 0;     if (L <= m) ans += query(L, R, rt << 1, l, m);     if (R > m) ans += query(L, R, rt << 1 | 1, m + 1, r);     return ans;   }   int main() {     ios::sync_with_stdio(false);     int n, m, t, l, r;     for (int i = 1; i < N; i++) {       for (int j = i; j < N; j += i) d[j]++;     }     cin >> n >> m;     for (int i = 1; i <= n; i++) cin >> arr[i];     build(1, 1, n);     while (m--) {       cin >> t >> l >> r;       if (t == 1)         update(l, r, 1, 1, n);       else         cout << query(l, r, 1, 1, n) << endl;     }   }   