The factors of the number 2,121,504 are: 1, 2, 3, 4, 6, 7, 8, 11, 12, 14, 16, 21, 22, 24, 28, 32, 33, 41, 42, 44, 48, 49, 56, 66, 77, 82, 84, 88, 96, 98, 112, 123, 132, 147, 154, 164, 168, 176, 196, 224, 231, 246, 264, 287, 294, 308, 328, 336, 352, 392, 451, 462, 492, 528, 539, 574, 588, 616, 656, 672, 784, 861, 902, 924, 984, 1056, 1078, 1148, 1176, 1232, 1312, 1353, 1568, 1617, 1722, 1804, 1848, 1968, 2009, 2156, 2296, 2352, 2464, 2706, 3157, 3234, 3444, 3608, 3696, 3936, 4018, 4312, 4592, 4704, 5412, 6027, 6314, 6468, 6888, 7216, 7392, 8036, 8624, 9184, 9471, 10824, 12054, 12628, 12936, 13776, 14432, 16072, 17248, 18942, 21648, 22099, 24108, 25256, 25872, 27552, 32144, 37884, 43296, 44198, 48216, 50512, 51744, 64288, 66297, 75768, 88396, 96432, 101024, 132594, 151536, 176792, 192864, 265188, 303072, 353584, 530376, 707168, 1060752, 2121504.
If you add them up, you will get the total of 7,239,456.