The factors of the number 645,078,252 are: 1, 2, 3, 4, 6, 7, 12, 13, 14, 21, 26, 28, 39, 42, 52, 78, 84, 91, 156, 182, 273, 364, 487, 546, 974, 1092, 1213, 1461, 1948, 2426, 2922, 3409, 3639, 4852, 5844, 6331, 6818, 7278, 8491, 10227, 12662, 13636, 14556, 15769, 16982, 18993, 20454, 25324, 25473, 31538, 33964, 37986, 40908, 44317, 47307, 50946, 63076, 75972, 88634, 94614, 101892, 110383, 132951, 177268, 189228, 220766, 265902, 331149, 441532, 531804, 590731, 662298, 1181462, 1324596, 1772193, 2362924, 3544386, 4135117, 7088772, 7679503, 8270234, 12405351, 15359006, 16540468, 23038509, 24810702, 30718012, 46077018, 49621404, 53756521, 92154036, 107513042, 161269563, 215026084, 322539126, 645078252.
If you add them up, you will get the total of 1,857,866,752.