20420640

素因数分解:

$2^5\times 3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1$

素因数の和:216

約数の個数: 192

約数和(自身を含む): 74390400

約数和(自身を除く): 53969760

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 29, 30, 32, 36, 40, 45, 48, 54, 58, 60, 72, 80, 87, 90, 96, 108, 116, 120, 135, 144, 145, 160, 163, 174, 180, 216, 232, 240, 261, 270, 288, 290, 326, 348, 360, 432, 435, 464, 480, 489, 522, 540, 580, 652, 696, 720, 783, 815, 864, 870, 928, 978, 1044, 1080, 1160, 1304, 1305, 1392, 1440, 1467, 1566, 1630, 1740, 1956, 2088, 2160, 2320, 2445, 2608, 2610, 2784, 2934, 3132, 3260, 3480, 3912, 3915, 4176, 4320, 4401, 4640, 4727, 4890, 5216, 5220, 5868, 6264, 6520, 6960, 7335, 7824, 7830, 8352, 8802, 9454, 9780, 10440, 11736, 12528, 13040, 13920, 14181, 14670, 15648, 15660, 17604, 18908, 19560, 20880, 22005, 23472, 23635, 25056, 26080, 28362, 29340, 31320, 35208, 37816, 39120, 41760, 42543, 44010, 46944, 47270, 56724, 58680, 62640, 70416, 70905, 75632, 78240, 85086, 88020, 94540, 113448, 117360, 125280, 127629, 140832, 141810, 151264, 170172, 176040, 189080, 212715, 226896, 234720, 255258, 283620, 340344, 352080, 378160, 425430, 453792, 510516, 567240, 638145, 680688, 704160, 756320, 850860, 1021032, 1134480, 1276290, 1361376, 1701720, 2042064, 2268960, 2552580, 3403440, 4084128, 5105160, 6806880, 10210320, 20420640]

約数ペア:

[(1, 20420640), (2, 10210320), (3, 6806880), (4, 5105160), (5, 4084128), (6, 3403440), (8, 2552580), (9, 2268960), (10, 2042064), (12, 1701720), (15, 1361376), (16, 1276290), (18, 1134480), (20, 1021032), (24, 850860), (27, 756320), (29, 704160), (30, 680688), (32, 638145), (36, 567240), (40, 510516), (45, 453792), (48, 425430), (54, 378160), (58, 352080), (60, 340344), (72, 283620), (80, 255258), (87, 234720), (90, 226896), (96, 212715), (108, 189080), (116, 176040), (120, 170172), (135, 151264), (144, 141810), (145, 140832), (160, 127629), (163, 125280), (174, 117360), (180, 113448), (216, 94540), (232, 88020), (240, 85086), (261, 78240), (270, 75632), (288, 70905), (290, 70416), (326, 62640), (348, 58680), (360, 56724), (432, 47270), (435, 46944), (464, 44010), (480, 42543), (489, 41760), (522, 39120), (540, 37816), (580, 35208), (652, 31320), (696, 29340), (720, 28362), (783, 26080), (815, 25056), (864, 23635), (870, 23472), (928, 22005), (978, 20880), (1044, 19560), (1080, 18908), (1160, 17604), (1304, 15660), (1305, 15648), (1392, 14670), (1440, 14181), (1467, 13920), (1566, 13040), (1630, 12528), (1740, 11736), (1956, 10440), (2088, 9780), (2160, 9454), (2320, 8802), (2445, 8352), (2608, 7830), (2610, 7824), (2784, 7335), (2934, 6960), (3132, 6520), (3260, 6264), (3480, 5868), (3912, 5220), (3915, 5216), (4176, 4890), (4320, 4727), (4401, 4640)]