The factors of the number 8,621,844 are: 1, 2, 3, 4, 6, 7, 11, 12, 14, 21, 22, 28, 31, 33, 42, 43, 44, 49, 62, 66, 77, 84, 86, 93, 98, 124, 129, 132, 147, 154, 172, 186, 196, 217, 231, 258, 294, 301, 308, 341, 372, 434, 462, 473, 516, 539, 588, 602, 651, 682, 868, 903, 924, 946, 1023, 1078, 1204, 1302, 1333, 1364, 1419, 1519, 1617, 1806, 1892, 2046, 2107, 2156, 2387, 2604, 2666, 2838, 3038, 3234, 3311, 3612, 3999, 4092, 4214, 4557, 4774, 5332, 5676, 6076, 6321, 6468, 6622, 7161, 7998, 8428, 9114, 9331, 9548, 9933, 12642, 13244, 14322, 14663, 15996, 16709, 18228, 18662, 19866, 23177, 25284, 27993, 28644, 29326, 33418, 37324, 39732, 43989, 46354, 50127, 55986, 58652, 65317, 66836, 69531, 87978, 92708, 100254, 102641, 111972, 130634, 139062, 175956, 195951, 200508, 205282, 261268, 278124, 307923, 391902, 410564, 615846, 718487, 783804, 1231692, 1436974, 2155461, 2873948, 4310922, 8621844.
If you add them up, you will get the total of 8,621,862. Now subtract 8,621,844 to get 18,344,172