¾Æµé·¡¹Ì°¡ ¼öÇй®Á¦¸¦ Ç®´Ù ¸Ó¸®¸¦ ¹Û°í Àֳ׿ä..
¼öÇÐ °í¼ö´Ô ÀÖÀ¸½Ã¸é Á» µµ¿ÍÁÖ¼¼¿ä...
 
Four different digits are selected at random from digits 1 through 9. S is the sum of all possible four - digit numbers that can be created using this four digits. F is the greatest common factor of all such sums. Find F.