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36 lines
549 B
C++
36 lines
549 B
C++
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#include <iostream>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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long long r, ans = 1;
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cin >> r;
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for (int i = 2; i * i <= r; i++) {
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if (r % i == 0) {
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int cnt = 0;
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while (r % i == 0) {
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r /= i;
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cnt++;
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}
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if (i % 4 == 1) ans *= cnt * 2 + 1;
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}
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}
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if (r != 1 && r % 4 == 1) {
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ans *= 3;
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}
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cout << ans * 4 << endl;
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return 0;
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}
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