The factors of the number 261,225,720 are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 23, 24, 28, 30, 35, 36, 40, 42, 45, 46, 56, 60, 63, 69, 70, 72, 84, 90, 92, 105, 115, 120, 126, 138, 140, 161, 168, 180, 184, 207, 210, 230, 252, 276, 280, 315, 322, 345, 360, 414, 420, 460, 483, 504, 552, 630, 644, 690, 805, 828, 840, 920, 966, 1035, 1260, 1288, 1380, 1449, 1610, 1656, 1932, 2070, 2415, 2520, 2760, 2898, 3220, 3864, 4140, 4507, 4830, 5796, 6440, 7245, 8280, 9014, 9660, 11592, 13521, 14490, 18028, 19320, 22535, 27042, 28980, 31549, 36056, 40563, 45070, 54084, 57960, 63098, 67605, 81126, 90140, 94647, 103661, 108168, 126196, 135210, 157745, 162252, 180280, 189294, 202815, 207322, 252392, 270420, 283941, 310983, 315490, 324504, 378588, 405630, 414644, 473235, 518305, 540840, 567882, 621966, 630980, 725627, 757176, 811260, 829288, 932949, 946470, 1036610, 1135764, 1243932, 1261960, 1419705, 1451254, 1554915, 1622520, 1865898, 1892940, 2073220, 2176881, 2271528, 2487864, 2839410, 2902508, 3109830, 3628135, 3731796, 3785880, 4146440, 4353762, 4664745, 5678820, 5805016, 6219660, 6530643, 7256270, 7463592, 8707524, 9329490, 10884405, 11357640, 12439320, 13061286, 14512540, 17415048, 18658980, 21768810, 26122572, 29025080, 32653215, 37317960, 43537620, 52245144, 65306430, 87075240, 130612860, 261225720.
If you add them up, you will get the total of 261,226,471. Now subtract 261,225,720 to get 751,451,400