The factors of the number 8,438,220 are: 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 37, 42, 45, 60, 63, 70, 74, 84, 90, 105, 111, 126, 140, 148, 180, 181, 185, 210, 222, 252, 259, 315, 333, 362, 370, 420, 444, 518, 543, 555, 630, 666, 724, 740, 777, 905, 1036, 1086, 1110, 1260, 1267, 1295, 1332, 1554, 1629, 1665, 1810, 2172, 2220, 2331, 2534, 2590, 2715, 3108, 3258, 3330, 3620, 3801, 3885, 4662, 5068, 5180, 5430, 6335, 6516, 6660, 6697, 7602, 7770, 8145, 9324, 10860, 11403, 11655, 12670, 13394, 15204, 15540, 16290, 19005, 20091, 22806, 23310, 25340, 26788, 32580, 33485, 38010, 40182, 45612, 46620, 46879, 57015, 60273, 66970, 76020, 80364, 93758, 100455, 114030, 120546, 133940, 140637, 187516, 200910, 228060, 234395, 241092, 281274, 301365, 401820, 421911, 468790, 562548, 602730, 703185, 843822, 937580, 1205460, 1406370, 1687644, 2109555, 2812740, 4219110, 8438220.
If you add them up, you will get the total of 8,438,241. Now subtract 8,438,220 to get 21,770,868