81536840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1151}}^1$

素因数の和:1203

約数の個数: 128

約数和(自身を含む): 238878720

約数和(自身を除く): 157341880

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 23, 28, 35, 40, 44, 46, 55, 56, 70, 77, 88, 92, 110, 115, 140, 154, 161, 184, 220, 230, 253, 280, 308, 322, 385, 440, 460, 506, 616, 644, 770, 805, 920, 1012, 1151, 1265, 1288, 1540, 1610, 1771, 2024, 2302, 2530, 3080, 3220, 3542, 4604, 5060, 5755, 6440, 7084, 8057, 8855, 9208, 10120, 11510, 12661, 14168, 16114, 17710, 23020, 25322, 26473, 32228, 35420, 40285, 46040, 50644, 52946, 63305, 64456, 70840, 80570, 88627, 101288, 105892, 126610, 132365, 161140, 177254, 185311, 211784, 253220, 264730, 291203, 322280, 354508, 370622, 443135, 506440, 529460, 582406, 709016, 741244, 886270, 926555, 1058920, 1164812, 1456015, 1482488, 1772540, 1853110, 2038421, 2329624, 2912030, 3545080, 3706220, 4076842, 5824060, 7412440, 8153684, 10192105, 11648120, 16307368, 20384210, 40768420, 81536840]

約数ペア:

[(1, 81536840), (2, 40768420), (4, 20384210), (5, 16307368), (7, 11648120), (8, 10192105), (10, 8153684), (11, 7412440), (14, 5824060), (20, 4076842), (22, 3706220), (23, 3545080), (28, 2912030), (35, 2329624), (40, 2038421), (44, 1853110), (46, 1772540), (55, 1482488), (56, 1456015), (70, 1164812), (77, 1058920), (88, 926555), (92, 886270), (110, 741244), (115, 709016), (140, 582406), (154, 529460), (161, 506440), (184, 443135), (220, 370622), (230, 354508), (253, 322280), (280, 291203), (308, 264730), (322, 253220), (385, 211784), (440, 185311), (460, 177254), (506, 161140), (616, 132365), (644, 126610), (770, 105892), (805, 101288), (920, 88627), (1012, 80570), (1151, 70840), (1265, 64456), (1288, 63305), (1540, 52946), (1610, 50644), (1771, 46040), (2024, 40285), (2302, 35420), (2530, 32228), (3080, 26473), (3220, 25322), (3542, 23020), (4604, 17710), (5060, 16114), (5755, 14168), (6440, 12661), (7084, 11510), (8057, 10120), (8855, 9208)]