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22 lines
465 B
22 lines
465 B
#include <bits/stdc++.h>
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using namespace std;
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typedef long long LL;
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int n;
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bool prime(int x) {
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if (x == 2) return 1;
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for (int i = 2; i * i <= x; i++)
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if (x % i == 0) return 0;
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return 1;
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}
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int main() {
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cin >> n;
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for (int i = 2; i <= n; i++) {
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if (!prime(i)) continue;
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LL x = i;
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int ans = 0;
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while (x <= n) ans += n / x, x *= i;
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printf("%d %d\n", i, ans);
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}
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return 0;
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} |