81530240

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{313}}^1$

素因数の和:380

約数の個数: 128

約数和(自身を含む): 219071520

約数和(自身を除く): 137541280

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 37, 40, 44, 55, 64, 74, 80, 88, 110, 128, 148, 160, 176, 185, 220, 296, 313, 320, 352, 370, 407, 440, 592, 626, 640, 704, 740, 814, 880, 1184, 1252, 1408, 1480, 1565, 1628, 1760, 2035, 2368, 2504, 2960, 3130, 3256, 3443, 3520, 4070, 4736, 5008, 5920, 6260, 6512, 6886, 7040, 8140, 10016, 11581, 11840, 12520, 13024, 13772, 16280, 17215, 20032, 23162, 23680, 25040, 26048, 27544, 32560, 34430, 40064, 46324, 50080, 52096, 55088, 57905, 65120, 68860, 92648, 100160, 110176, 115810, 127391, 130240, 137720, 185296, 200320, 220352, 231620, 254782, 260480, 275440, 370592, 440704, 463240, 509564, 550880, 636955, 741184, 926480, 1019128, 1101760, 1273910, 1482368, 1852960, 2038256, 2203520, 2547820, 3705920, 4076512, 5095640, 7411840, 8153024, 10191280, 16306048, 20382560, 40765120, 81530240]

約数ペア:

[(1, 81530240), (2, 40765120), (4, 20382560), (5, 16306048), (8, 10191280), (10, 8153024), (11, 7411840), (16, 5095640), (20, 4076512), (22, 3705920), (32, 2547820), (37, 2203520), (40, 2038256), (44, 1852960), (55, 1482368), (64, 1273910), (74, 1101760), (80, 1019128), (88, 926480), (110, 741184), (128, 636955), (148, 550880), (160, 509564), (176, 463240), (185, 440704), (220, 370592), (296, 275440), (313, 260480), (320, 254782), (352, 231620), (370, 220352), (407, 200320), (440, 185296), (592, 137720), (626, 130240), (640, 127391), (704, 115810), (740, 110176), (814, 100160), (880, 92648), (1184, 68860), (1252, 65120), (1408, 57905), (1480, 55088), (1565, 52096), (1628, 50080), (1760, 46324), (2035, 40064), (2368, 34430), (2504, 32560), (2960, 27544), (3130, 26048), (3256, 25040), (3443, 23680), (3520, 23162), (4070, 20032), (4736, 17215), (5008, 16280), (5920, 13772), (6260, 13024), (6512, 12520), (6886, 11840), (7040, 11581), (8140, 10016)]