20640960

素因数分解:

$2^6\times 3^3\times 5^1\times {\mathrm{2389}}^1$

素因数の和:2415

約数の個数: 112

約数和(自身を含む): 72847200

約数和(自身を除く): 52206240

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 64, 72, 80, 90, 96, 108, 120, 135, 144, 160, 180, 192, 216, 240, 270, 288, 320, 360, 432, 480, 540, 576, 720, 864, 960, 1080, 1440, 1728, 2160, 2389, 2880, 4320, 4778, 7167, 8640, 9556, 11945, 14334, 19112, 21501, 23890, 28668, 35835, 38224, 43002, 47780, 57336, 64503, 71670, 76448, 86004, 95560, 107505, 114672, 129006, 143340, 152896, 172008, 191120, 215010, 229344, 258012, 286680, 322515, 344016, 382240, 430020, 458688, 516024, 573360, 645030, 688032, 764480, 860040, 1032048, 1146720, 1290060, 1376064, 1720080, 2064096, 2293440, 2580120, 3440160, 4128192, 5160240, 6880320, 10320480, 20640960]

約数ペア:

[(1, 20640960), (2, 10320480), (3, 6880320), (4, 5160240), (5, 4128192), (6, 3440160), (8, 2580120), (9, 2293440), (10, 2064096), (12, 1720080), (15, 1376064), (16, 1290060), (18, 1146720), (20, 1032048), (24, 860040), (27, 764480), (30, 688032), (32, 645030), (36, 573360), (40, 516024), (45, 458688), (48, 430020), (54, 382240), (60, 344016), (64, 322515), (72, 286680), (80, 258012), (90, 229344), (96, 215010), (108, 191120), (120, 172008), (135, 152896), (144, 143340), (160, 129006), (180, 114672), (192, 107505), (216, 95560), (240, 86004), (270, 76448), (288, 71670), (320, 64503), (360, 57336), (432, 47780), (480, 43002), (540, 38224), (576, 35835), (720, 28668), (864, 23890), (960, 21501), (1080, 19112), (1440, 14334), (1728, 11945), (2160, 9556), (2389, 8640), (2880, 7167), (4320, 4778)]