The factors of the number 8,675,640 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 29, 30, 36, 40, 45, 54, 58, 60, 72, 87, 90, 108, 116, 120, 135, 145, 174, 180, 216, 232, 261, 270, 277, 290, 348, 360, 435, 522, 540, 554, 580, 696, 783, 831, 870, 1044, 1080, 1108, 1160, 1305, 1385, 1566, 1662, 1740, 2088, 2216, 2493, 2610, 2770, 3132, 3324, 3480, 3915, 4155, 4986, 5220, 5540, 6264, 6648, 7479, 7830, 8033, 8310, 9972, 10440, 11080, 12465, 14958, 15660, 16066, 16620, 19944, 24099, 24930, 29916, 31320, 32132, 33240, 37395, 40165, 48198, 49860, 59832, 64264, 72297, 74790, 80330, 96396, 99720, 120495, 144594, 149580, 160660, 192792, 216891, 240990, 289188, 299160, 321320, 361485, 433782, 481980, 578376, 722970, 867564, 963960, 1084455, 1445940, 1735128, 2168910, 2891880, 4337820, 8675640.
If you add them up, you will get the total of 8,675,661. Now subtract 8,675,640 to get 21,348,360