The factors of the number 8,640,000 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 27, 30, 32, 36, 40, 45, 48, 50, 54, 60, 64, 72, 75, 80, 90, 96, 100, 108, 120, 125, 128, 135, 144, 150, 160, 180, 192, 200, 216, 225, 240, 250, 256, 270, 288, 300, 320, 360, 375, 384, 400, 432, 450, 480, 500, 512, 540, 576, 600, 625, 640, 675, 720, 750, 768, 800, 864, 900, 960, 1000, 1080, 1125, 1152, 1200, 1250, 1280, 1350, 1440, 1500, 1536, 1600, 1728, 1800, 1875, 1920, 2000, 2160, 2250, 2304, 2400, 2500, 2560, 2700, 2880, 3000, 3200, 3375, 3456, 3600, 3750, 3840, 4000, 4320, 4500, 4608, 4800, 5000, 5400, 5625, 5760, 6000, 6400, 6750, 6912, 7200, 7500, 7680, 8000, 8640, 9000, 9600, 10000, 10800, 11250, 11520, 12000, 12800, 13500, 13824, 14400, 15000, 16000, 16875, 17280, 18000, 19200, 20000, 21600, 22500, 23040, 24000, 27000, 28800, 30000, 32000, 33750, 34560, 36000, 38400, 40000, 43200, 45000, 48000, 54000, 57600, 60000, 64000, 67500, 69120, 72000, 80000, 86400, 90000, 96000, 108000, 115200, 120000, 135000, 144000, 160000, 172800, 180000, 192000, 216000, 240000, 270000, 288000, 320000, 345600, 360000, 432000, 480000, 540000, 576000, 720000, 864000, 960000, 1080000, 1440000, 1728000, 2160000, 2880000, 4320000, 8640000.
If you add them up, you will get the total of 31,958,520.