81907840

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{389}}^1$

素因数の和:462

約数の個数: 128

約数和(自身を含む): 229132800

約数和(自身を除く): 147224960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 47, 56, 64, 70, 80, 94, 112, 128, 140, 160, 188, 224, 235, 280, 320, 329, 376, 389, 448, 470, 560, 640, 658, 752, 778, 896, 940, 1120, 1316, 1504, 1556, 1645, 1880, 1945, 2240, 2632, 2723, 3008, 3112, 3290, 3760, 3890, 4480, 5264, 5446, 6016, 6224, 6580, 7520, 7780, 10528, 10892, 12448, 13160, 13615, 15040, 15560, 18283, 21056, 21784, 24896, 26320, 27230, 30080, 31120, 36566, 42112, 43568, 49792, 52640, 54460, 62240, 73132, 87136, 91415, 105280, 108920, 124480, 127981, 146264, 174272, 182830, 210560, 217840, 248960, 255962, 292528, 348544, 365660, 435680, 511924, 585056, 639905, 731320, 871360, 1023848, 1170112, 1279810, 1462640, 1742720, 2047696, 2340224, 2559620, 2925280, 4095392, 5119240, 5850560, 8190784, 10238480, 11701120, 16381568, 20476960, 40953920, 81907840]

約数ペア:

[(1, 81907840), (2, 40953920), (4, 20476960), (5, 16381568), (7, 11701120), (8, 10238480), (10, 8190784), (14, 5850560), (16, 5119240), (20, 4095392), (28, 2925280), (32, 2559620), (35, 2340224), (40, 2047696), (47, 1742720), (56, 1462640), (64, 1279810), (70, 1170112), (80, 1023848), (94, 871360), (112, 731320), (128, 639905), (140, 585056), (160, 511924), (188, 435680), (224, 365660), (235, 348544), (280, 292528), (320, 255962), (329, 248960), (376, 217840), (389, 210560), (448, 182830), (470, 174272), (560, 146264), (640, 127981), (658, 124480), (752, 108920), (778, 105280), (896, 91415), (940, 87136), (1120, 73132), (1316, 62240), (1504, 54460), (1556, 52640), (1645, 49792), (1880, 43568), (1945, 42112), (2240, 36566), (2632, 31120), (2723, 30080), (3008, 27230), (3112, 26320), (3290, 24896), (3760, 21784), (3890, 21056), (4480, 18283), (5264, 15560), (5446, 15040), (6016, 13615), (6224, 13160), (6580, 12448), (7520, 10892), (7780, 10528)]