`color(#5C73B9ff)(H)color(#6B68C0ff)(o)color(#795DC6ff)(r)color(#8852CDff)(i)color(#9646D4ff)(z)color(#A53BDAff)(o)color(#B330E1ff)(n)`

#include <bits/stdc++.h>
using namespace std;

void tsnt(long long n) {
    vector<pair<int, int>> so;

    for (int i = 2; i * i <= n; i++) {
        int dem = 0;
        while (n % i == 0) {
            dem++;
            n /= i;
        }
        if (dem > 0) so.push_back({i, dem});
    }

    if (n > 1) so.push_back({n, 1});

    cout << so.size() << '\n';

    for (const auto& pair : so) cout << pair.first << " " << pair.second << '\n';
}

int main() {
    long long n;
    cin >> n;
    tsnt(n);
    return 0;
}