#include <stdio.h>

int main()
{
	int M;
	scanf("%d", &M);
	if (M == 0) {
		printf("1\n1\n");
		fflush(stdout);
		return 0;
	}
	
	char flag[100001] = {};
	int i, j, k, m, bit[31], prime[20000];
	for (k = 1, bit[0] = 1; k <= 30; k++) bit[k] = bit[k-1] << 1;
	for (i = 2, m = 0; i <= 100000; i++) {
		if (flag[i] != 0) continue;
		prime[m++] = i;
		for (j = i * 2; j <= 100000; j += i) flag[j] = 1;
	}
	m--;
	
	int l = 0, n = 0, ans[100001];
	for (k = 29; k >= 0; k--) {
		if ((M & bit[k]) == 0) continue;
		ans[n++] = prime[m--];
		for (i = 0; i < k; i++) {
			while (prime[m] * prime[l] > 100000) m--;
			ans[n++] = prime[m--] * prime[l];
		}
		l++;
	}
	printf("%d\n", n);
	for (i = 0; i < n; i++) printf("%d ", ans[i]);
	fflush(stdout);
	return 0;
}