20408065864

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{127}}^1\times {\mathrm{691}}^1\times {\mathrm{709}}^1$

素因数の和:1574

約数の個数: 64

約数和(自身を含む): 39620044800

約数和(自身を除く): 19211978936

約数列:

[1, 2, 4, 8, 41, 82, 127, 164, 254, 328, 508, 691, 709, 1016, 1382, 1418, 2764, 2836, 5207, 5528, 5672, 10414, 20828, 28331, 29069, 41656, 56662, 58138, 87757, 90043, 113324, 116276, 175514, 180086, 226648, 232552, 351028, 360172, 489919, 702056, 720344, 979838, 1959676, 3598037, 3691763, 3919352, 7196074, 7383526, 14392148, 14767052, 20086679, 28784296, 29534104, 40173358, 62219713, 80346716, 124439426, 160693432, 248878852, 497757704, 2551008233, 5102016466, 10204032932, 20408065864]

約数ペア:

[(1, 20408065864), (2, 10204032932), (4, 5102016466), (8, 2551008233), (41, 497757704), (82, 248878852), (127, 160693432), (164, 124439426), (254, 80346716), (328, 62219713), (508, 40173358), (691, 29534104), (709, 28784296), (1016, 20086679), (1382, 14767052), (1418, 14392148), (2764, 7383526), (2836, 7196074), (5207, 3919352), (5528, 3691763), (5672, 3598037), (10414, 1959676), (20828, 979838), (28331, 720344), (29069, 702056), (41656, 489919), (56662, 360172), (58138, 351028), (87757, 232552), (90043, 226648), (113324, 180086), (116276, 175514)]