81454040

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:177

約数の個数: 128

約数和(自身を含む): 205286400

約数和(自身を除く): 123832360

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 29, 40, 43, 46, 58, 71, 86, 92, 115, 116, 142, 145, 172, 184, 215, 230, 232, 284, 290, 344, 355, 430, 460, 568, 580, 667, 710, 860, 920, 989, 1160, 1247, 1334, 1420, 1633, 1720, 1978, 2059, 2494, 2668, 2840, 3053, 3266, 3335, 3956, 4118, 4945, 4988, 5336, 6106, 6235, 6532, 6670, 7912, 8165, 8236, 9890, 9976, 10295, 12212, 12470, 13064, 13340, 15265, 16330, 16472, 19780, 20590, 24424, 24940, 26680, 28681, 30530, 32660, 39560, 41180, 47357, 49880, 57362, 61060, 65320, 70219, 82360, 88537, 94714, 114724, 122120, 140438, 143405, 177074, 189428, 229448, 236785, 280876, 286810, 351095, 354148, 378856, 442685, 473570, 561752, 573620, 702190, 708296, 885370, 947140, 1147240, 1404380, 1770740, 1894280, 2036351, 2808760, 3541480, 4072702, 8145404, 10181755, 16290808, 20363510, 40727020, 81454040]

約数ペア:

[(1, 81454040), (2, 40727020), (4, 20363510), (5, 16290808), (8, 10181755), (10, 8145404), (20, 4072702), (23, 3541480), (29, 2808760), (40, 2036351), (43, 1894280), (46, 1770740), (58, 1404380), (71, 1147240), (86, 947140), (92, 885370), (115, 708296), (116, 702190), (142, 573620), (145, 561752), (172, 473570), (184, 442685), (215, 378856), (230, 354148), (232, 351095), (284, 286810), (290, 280876), (344, 236785), (355, 229448), (430, 189428), (460, 177074), (568, 143405), (580, 140438), (667, 122120), (710, 114724), (860, 94714), (920, 88537), (989, 82360), (1160, 70219), (1247, 65320), (1334, 61060), (1420, 57362), (1633, 49880), (1720, 47357), (1978, 41180), (2059, 39560), (2494, 32660), (2668, 30530), (2840, 28681), (3053, 26680), (3266, 24940), (3335, 24424), (3956, 20590), (4118, 19780), (4945, 16472), (4988, 16330), (5336, 15265), (6106, 13340), (6235, 13064), (6532, 12470), (6670, 12212), (7912, 10295), (8165, 9976), (8236, 9890)]