20480040

素因数分解:

$2^3\times 3^5\times 5^1\times 7^2\times {\mathrm{43}}^1$

素因数の和:83

約数の個数: 288

約数和(自身を含む): 82162080

約数和(自身を除く): 61682040

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 43, 45, 49, 54, 56, 60, 63, 70, 72, 81, 84, 86, 90, 98, 105, 108, 120, 126, 129, 135, 140, 147, 162, 168, 172, 180, 189, 196, 210, 215, 216, 243, 245, 252, 258, 270, 280, 294, 301, 315, 324, 344, 360, 378, 387, 392, 405, 420, 430, 441, 486, 490, 504, 516, 540, 567, 588, 602, 630, 645, 648, 735, 756, 774, 810, 840, 860, 882, 903, 945, 972, 980, 1032, 1080, 1134, 1161, 1176, 1204, 1215, 1260, 1290, 1323, 1470, 1505, 1512, 1548, 1620, 1701, 1720, 1764, 1806, 1890, 1935, 1944, 1960, 2107, 2205, 2268, 2322, 2408, 2430, 2520, 2580, 2646, 2709, 2835, 2940, 3010, 3096, 3240, 3402, 3483, 3528, 3612, 3780, 3870, 3969, 4214, 4410, 4515, 4536, 4644, 4860, 5160, 5292, 5418, 5670, 5805, 5880, 6020, 6321, 6615, 6804, 6966, 7224, 7560, 7740, 7938, 8127, 8428, 8505, 8820, 9030, 9288, 9720, 10449, 10535, 10584, 10836, 11340, 11610, 11907, 12040, 12642, 13230, 13545, 13608, 13932, 15480, 15876, 16254, 16856, 17010, 17415, 17640, 18060, 18963, 19845, 20898, 21070, 21672, 22680, 23220, 23814, 24381, 25284, 26460, 27090, 27864, 31605, 31752, 32508, 34020, 34830, 36120, 37926, 39690, 40635, 41796, 42140, 46440, 47628, 48762, 50568, 52245, 52920, 54180, 56889, 59535, 63210, 65016, 68040, 69660, 73143, 75852, 79380, 81270, 83592, 84280, 94815, 95256, 97524, 104490, 108360, 113778, 119070, 121905, 126420, 139320, 146286, 151704, 158760, 162540, 170667, 189630, 195048, 208980, 227556, 238140, 243810, 252840, 284445, 292572, 325080, 341334, 365715, 379260, 417960, 455112, 476280, 487620, 512001, 568890, 585144, 682668, 731430, 758520, 853335, 975240, 1024002, 1137780, 1365336, 1462860, 1706670, 2048004, 2275560, 2560005, 2925720, 3413340, 4096008, 5120010, 6826680, 10240020, 20480040]

約数ペア:

[(1, 20480040), (2, 10240020), (3, 6826680), (4, 5120010), (5, 4096008), (6, 3413340), (7, 2925720), (8, 2560005), (9, 2275560), (10, 2048004), (12, 1706670), (14, 1462860), (15, 1365336), (18, 1137780), (20, 1024002), (21, 975240), (24, 853335), (27, 758520), (28, 731430), (30, 682668), (35, 585144), (36, 568890), (40, 512001), (42, 487620), (43, 476280), (45, 455112), (49, 417960), (54, 379260), (56, 365715), (60, 341334), (63, 325080), (70, 292572), (72, 284445), (81, 252840), (84, 243810), (86, 238140), (90, 227556), (98, 208980), (105, 195048), (108, 189630), (120, 170667), (126, 162540), (129, 158760), (135, 151704), (140, 146286), (147, 139320), (162, 126420), (168, 121905), (172, 119070), (180, 113778), (189, 108360), (196, 104490), (210, 97524), (215, 95256), (216, 94815), (243, 84280), (245, 83592), (252, 81270), (258, 79380), (270, 75852), (280, 73143), (294, 69660), (301, 68040), (315, 65016), (324, 63210), (344, 59535), (360, 56889), (378, 54180), (387, 52920), (392, 52245), (405, 50568), (420, 48762), (430, 47628), (441, 46440), (486, 42140), (490, 41796), (504, 40635), (516, 39690), (540, 37926), (567, 36120), (588, 34830), (602, 34020), (630, 32508), (645, 31752), (648, 31605), (735, 27864), (756, 27090), (774, 26460), (810, 25284), (840, 24381), (860, 23814), (882, 23220), (903, 22680), (945, 21672), (972, 21070), (980, 20898), (1032, 19845), (1080, 18963), (1134, 18060), (1161, 17640), (1176, 17415), (1204, 17010), (1215, 16856), (1260, 16254), (1290, 15876), (1323, 15480), (1470, 13932), (1505, 13608), (1512, 13545), (1548, 13230), (1620, 12642), (1701, 12040), (1720, 11907), (1764, 11610), (1806, 11340), (1890, 10836), (1935, 10584), (1944, 10535), (1960, 10449), (2107, 9720), (2205, 9288), (2268, 9030), (2322, 8820), (2408, 8505), (2430, 8428), (2520, 8127), (2580, 7938), (2646, 7740), (2709, 7560), (2835, 7224), (2940, 6966), (3010, 6804), (3096, 6615), (3240, 6321), (3402, 6020), (3483, 5880), (3528, 5805), (3612, 5670), (3780, 5418), (3870, 5292), (3969, 5160), (4214, 4860), (4410, 4644), (4515, 4536)]