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23 lines
344 B
C
23 lines
344 B
C
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#include <math.h>
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#include <stdio.h>
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int main() {
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long long n, ans = 0;
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scanf("%lld", &n);
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for (long long i = 1; i <= (long long)sqrt(n); i++) {
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if (n % i == 0) {
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ans += i;
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if (i != n / i) {
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ans += n / i;
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}
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}
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}
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printf("%lld\n", ans);
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return 0;
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}
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