C++ 计算区间内所有整数因数之和的实现方法

```cpp #include <iostream> using namespace std; int main() { int m, n; cin >> m >> n; int totalSum = 0; for (int num = m; num <= n; ++num) { // 计算一个数的所有因数之和 int factorSum = 0; for (int i = 1; i * i <= num; ++i) { if (num % i == 0) { factorSum += i; if (i != num / i) { factorSum += num / i; } } } totalSum += factorSum; } cout << totalSum << endl; return 0; } ``` ######[AI问答 | 173点数解答 | 2026-06-20 20:11:02]