diff --git a/Luogu/T206821/T206821.cpp b/Luogu/T206821/T206821.cpp
new file mode 100644
index 00000000..b85f317b
--- /dev/null
+++ b/Luogu/T206821/T206821.cpp
@@ -0,0 +1,35 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int n, k, s;
+vector<int> a, b;
+
+int main() {
+    cin >> n >> k;
+    for (int i = 2; i * i <= n; i++) {
+        while (n % i == 0) {
+            a.push_back(i);
+            n /= i;
+        }
+    }
+    if (n > 1) a.push_back(n);
+    for (int i : a) {
+        s += i;
+        b.push_back(i);
+    }
+    if (s > k) {
+        cout << -1 << endl;
+        exit(0);
+    }
+    while (s < k) {
+        b.push_back(1);
+        s++;
+    }
+    cout << b.size() << endl;
+    for (int i : b) {
+        cout << i << ' ';
+    }
+    cout << endl;
+    return 0;
+}