The factors of the number 13,656,440 are: 1, 2, 4, 5, 7, 8, 10, 14, 17, 19, 20, 28, 34, 35, 38, 40, 56, 68, 70, 76, 85, 95, 119, 133, 136, 140, 151, 152, 170, 190, 238, 266, 280, 302, 323, 340, 380, 476, 532, 595, 604, 646, 665, 680, 755, 760, 952, 1057, 1064, 1190, 1208, 1292, 1330, 1510, 1615, 2114, 2261, 2380, 2567, 2584, 2660, 2869, 3020, 3230, 4228, 4522, 4760, 5134, 5285, 5320, 5738, 6040, 6460, 8456, 9044, 10268, 10570, 11305, 11476, 12835, 12920, 14345, 17969, 18088, 20083, 20536, 21140, 22610, 22952, 25670, 28690, 35938, 40166, 42280, 45220, 48773, 51340, 57380, 71876, 80332, 89845, 90440, 97546, 100415, 102680, 114760, 143752, 160664, 179690, 195092, 200830, 243865, 341411, 359380, 390184, 401660, 487730, 682822, 718760, 803320, 975460, 1365644, 1707055, 1950920, 2731288, 3414110, 6828220, 13656440.
If you add them up, you will get the total of 39,398,400.