#include <bits/stdc++.h>
using namespace std;
#define int long long
const int mod = 998244353;
vector<long long> fact, fact_inv, inv;
void init_nCk(int SIZE) {
    fact.resize(SIZE + 5);
    fact_inv.resize(SIZE + 5);
    inv.resize(SIZE + 5);
    fact[0] = fact[1] = 1;
    fact_inv[0] = fact_inv[1] = 1;
    inv[1] = 1;
    for (int i = 2; i < SIZE + 5; i++) {
        fact[i] = fact[i - 1] * i % mod;
        inv[i] = mod - inv[mod % i] * (mod / i) % mod;
        fact_inv[i] = fact_inv[i - 1] * inv[i] % mod;
    }
}
long long nCk(int n, int k) {
    if(n < k || n < 0 || k < 0) return 0;
    return fact[n] * (fact_inv[k] * fact_inv[n - k] % mod) % mod;
}
signed main(){
	init_nCk(2000000);
	int H,W,K;
	cin>>H>>W>>K;
	int ans = 0;
	for(int i=0;i<H;i++){
		if(K%(H-i) == 0 && K/(H-i) <= W){
			ans += nCk(H,i)*nCk(W,K/(H-i))%mod;
			ans %= mod;
		}
	}
	cout<<ans<<endl;
}