diff --git a/AcWing/869/869.cpp b/AcWing/869/869.cpp
new file mode 100644
index 00000000..ab96f2b3
--- /dev/null
+++ b/AcWing/869/869.cpp
@@ -0,0 +1,24 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int n, a;
+
+int main() {
+    cin >> n;
+    while (n--) {
+        set<int> ans;
+        cin >> a;
+        for (int i = 1; i * i <= a; i++) {
+            if (a % i == 0) {
+                ans.insert(i);
+                ans.insert(a / i);
+            }
+        }
+        for (int i : ans) {
+            cout << i << ' ';
+        }
+        cout << endl;
+    }
+    return 0;
+}