#include <stdio.h>
 
// 例として、rec関数がnの階乗を返すと仮定します。
int rec(int n) {
    int result = 1;
    for (int i = 1; i <= n; i++) {
        result *= i;
    }
    return result;
}
 
int main(void) {
    int n = 50; 
    // rec(i)がiで割り切れるかをチェック
    for (int i = 1; i <= n; i++) {
        int result = rec(i);
        if (result % i == 0) {  // 割り切れる場合
            printf("%d, ", i);
        }
    }
    return 0;
}
 

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