The factors of the number 303,240,420 are: 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 49, 60, 63, 70, 84, 90, 98, 105, 126, 140, 147, 180, 196, 210, 245, 252, 294, 315, 420, 441, 490, 588, 630, 735, 882, 980, 1260, 1470, 1764, 2205, 2940, 4410, 8820, 34381, 68762, 103143, 137524, 171905, 206286, 240667, 309429, 343810, 412572, 481334, 515715, 618858, 687620, 722001, 962668, 1031430, 1203335, 1237716, 1444002, 1547145, 1684669, 2062860, 2166003, 2406670, 2888004, 3094290, 3369338, 3610005, 4332006, 4813340, 5054007, 6188580, 6738676, 7220010, 8423345, 8664012, 10108014, 10830015, 14440020, 15162021, 16846690, 20216028, 21660030, 25270035, 30324042, 33693380, 43320060, 50540070, 60648084, 75810105, 101080140, 151620210, 303240420.
If you add them up, you will get the total of 1,070,036,604.