20754720

素因数分解:

$2^5\times 3^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:128

約数の個数: 288

約数和(自身を含む): 84913920

約数和(自身を除く): 64159200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 29, 30, 32, 35, 36, 40, 42, 45, 48, 56, 58, 60, 63, 70, 71, 72, 80, 84, 87, 90, 96, 105, 112, 116, 120, 126, 140, 142, 144, 145, 160, 168, 174, 180, 203, 210, 213, 224, 232, 240, 252, 261, 280, 284, 288, 290, 315, 336, 348, 355, 360, 406, 420, 426, 435, 464, 480, 497, 504, 522, 560, 568, 580, 609, 630, 639, 672, 696, 710, 720, 812, 840, 852, 870, 928, 994, 1008, 1015, 1044, 1065, 1120, 1136, 1160, 1218, 1260, 1278, 1305, 1392, 1420, 1440, 1491, 1624, 1680, 1704, 1740, 1827, 1988, 2016, 2030, 2059, 2088, 2130, 2272, 2320, 2436, 2485, 2520, 2556, 2610, 2784, 2840, 2982, 3045, 3195, 3248, 3360, 3408, 3480, 3654, 3976, 4060, 4118, 4176, 4260, 4473, 4640, 4872, 4970, 5040, 5112, 5220, 5680, 5964, 6090, 6177, 6390, 6496, 6816, 6960, 7308, 7455, 7952, 8120, 8236, 8352, 8520, 8946, 9135, 9744, 9940, 10080, 10224, 10295, 10440, 11360, 11928, 12180, 12354, 12780, 13920, 14413, 14616, 14910, 15904, 16240, 16472, 17040, 17892, 18270, 18531, 19488, 19880, 20448, 20590, 20880, 22365, 23856, 24360, 24708, 25560, 28826, 29232, 29820, 30885, 32480, 32944, 34080, 35784, 36540, 37062, 39760, 41180, 41760, 43239, 44730, 47712, 48720, 49416, 51120, 57652, 58464, 59640, 61770, 65888, 71568, 72065, 73080, 74124, 79520, 82360, 86478, 89460, 92655, 97440, 98832, 102240, 115304, 119280, 123540, 129717, 143136, 144130, 146160, 148248, 164720, 172956, 178920, 185310, 197664, 216195, 230608, 238560, 247080, 259434, 288260, 292320, 296496, 329440, 345912, 357840, 370620, 432390, 461216, 494160, 518868, 576520, 592992, 648585, 691824, 715680, 741240, 864780, 988320, 1037736, 1153040, 1297170, 1383648, 1482480, 1729560, 2075472, 2306080, 2594340, 2964960, 3459120, 4150944, 5188680, 6918240, 10377360, 20754720]

約数ペア:

[(1, 20754720), (2, 10377360), (3, 6918240), (4, 5188680), (5, 4150944), (6, 3459120), (7, 2964960), (8, 2594340), (9, 2306080), (10, 2075472), (12, 1729560), (14, 1482480), (15, 1383648), (16, 1297170), (18, 1153040), (20, 1037736), (21, 988320), (24, 864780), (28, 741240), (29, 715680), (30, 691824), (32, 648585), (35, 592992), (36, 576520), (40, 518868), (42, 494160), (45, 461216), (48, 432390), (56, 370620), (58, 357840), (60, 345912), (63, 329440), (70, 296496), (71, 292320), (72, 288260), (80, 259434), (84, 247080), (87, 238560), (90, 230608), (96, 216195), (105, 197664), (112, 185310), (116, 178920), (120, 172956), (126, 164720), (140, 148248), (142, 146160), (144, 144130), (145, 143136), (160, 129717), (168, 123540), (174, 119280), (180, 115304), (203, 102240), (210, 98832), (213, 97440), (224, 92655), (232, 89460), (240, 86478), (252, 82360), (261, 79520), (280, 74124), (284, 73080), (288, 72065), (290, 71568), (315, 65888), (336, 61770), (348, 59640), (355, 58464), (360, 57652), (406, 51120), (420, 49416), (426, 48720), (435, 47712), (464, 44730), (480, 43239), (497, 41760), (504, 41180), (522, 39760), (560, 37062), (568, 36540), (580, 35784), (609, 34080), (630, 32944), (639, 32480), (672, 30885), (696, 29820), (710, 29232), (720, 28826), (812, 25560), (840, 24708), (852, 24360), (870, 23856), (928, 22365), (994, 20880), (1008, 20590), (1015, 20448), (1044, 19880), (1065, 19488), (1120, 18531), (1136, 18270), (1160, 17892), (1218, 17040), (1260, 16472), (1278, 16240), (1305, 15904), (1392, 14910), (1420, 14616), (1440, 14413), (1491, 13920), (1624, 12780), (1680, 12354), (1704, 12180), (1740, 11928), (1827, 11360), (1988, 10440), (2016, 10295), (2030, 10224), (2059, 10080), (2088, 9940), (2130, 9744), (2272, 9135), (2320, 8946), (2436, 8520), (2485, 8352), (2520, 8236), (2556, 8120), (2610, 7952), (2784, 7455), (2840, 7308), (2982, 6960), (3045, 6816), (3195, 6496), (3248, 6390), (3360, 6177), (3408, 6090), (3480, 5964), (3654, 5680), (3976, 5220), (4060, 5112), (4118, 5040), (4176, 4970), (4260, 4872), (4473, 4640)]