The factors of the number 537,026,280 are: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 49, 56, 60, 70, 84, 98, 105, 120, 140, 147, 168, 196, 210, 245, 280, 294, 392, 420, 490, 588, 735, 840, 980, 1176, 1470, 1960, 2940, 5880, 91331, 182662, 273993, 365324, 456655, 547986, 639317, 730648, 913310, 1095972, 1278634, 1369965, 1826620, 1917951, 2191944, 2557268, 2739930, 3196585, 3653240, 3835902, 4475219, 5114536, 5479860, 6393170, 7671804, 8950438, 9589755, 10959720, 12786340, 13425657, 15343608, 17900876, 19179510, 22376095, 25572680, 26851314, 35801752, 38359020, 44752190, 53702628, 67128285, 76718040, 89504380, 107405256, 134256570, 179008760, 268513140, 537026280.
If you add them up, you will get the total of 1,874,132,640.