The factors of the number 17,721,720 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 61, 72, 90, 108, 120, 122, 135, 180, 183, 216, 244, 269, 270, 305, 360, 366, 488, 538, 540, 549, 610, 732, 807, 915, 1076, 1080, 1098, 1220, 1345, 1464, 1614, 1647, 1830, 2152, 2196, 2421, 2440, 2690, 2745, 3228, 3294, 3660, 4035, 4392, 4842, 5380, 5490, 6456, 6588, 7263, 7320, 8070, 8235, 9684, 10760, 10980, 12105, 13176, 14526, 16140, 16409, 16470, 19368, 21960, 24210, 29052, 32280, 32818, 32940, 36315, 48420, 49227, 58104, 65636, 65880, 72630, 82045, 96840, 98454, 131272, 145260, 147681, 164090, 196908, 246135, 290520, 295362, 328180, 393816, 443043, 492270, 590724, 656360, 738405, 886086, 984540, 1181448, 1476810, 1772172, 1969080, 2215215, 2953620, 3544344, 4430430, 5907240, 8860860, 17721720.
If you add them up, you will get the total of 60,264,000.