The factors of the number 15,440,040 are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 18, 20, 21, 22, 24, 28, 30, 33, 35, 36, 40, 42, 44, 45, 55, 56, 60, 63, 66, 70, 72, 77, 84, 88, 90, 99, 105, 110, 120, 126, 132, 140, 154, 165, 168, 180, 198, 210, 220, 231, 252, 264, 280, 308, 315, 330, 360, 385, 396, 420, 440, 462, 495, 504, 557, 616, 630, 660, 693, 770, 792, 840, 924, 990, 1114, 1155, 1260, 1320, 1386, 1540, 1671, 1848, 1980, 2228, 2310, 2520, 2772, 2785, 3080, 3342, 3465, 3899, 3960, 4456, 4620, 5013, 5544, 5570, 6127, 6684, 6930, 7798, 8355, 9240, 10026, 11140, 11697, 12254, 13368, 13860, 15596, 16710, 18381, 19495, 20052, 22280, 23394, 24508, 25065, 27720, 30635, 31192, 33420, 35091, 36762, 38990, 40104, 42889, 46788, 49016, 50130, 55143, 58485, 61270, 66840, 70182, 73524, 77980, 85778, 91905, 93576, 100260, 110286, 116970, 122540, 128667, 140364, 147048, 155960, 171556, 175455, 183810, 200520, 214445, 220572, 233940, 245080, 257334, 275715, 280728, 343112, 350910, 367620, 386001, 428890, 441144, 467880, 514668, 551430, 643335, 701820, 735240, 772002, 857780, 1029336, 1102860, 1286670, 1403640, 1544004, 1715560, 1930005, 2205720, 2573340, 3088008, 3860010, 5146680, 7720020, 15440040.
If you add them up, you will get the total of 62,674,560.