81987928

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{461}}^1$

素因数の和:568

約数の個数: 64

約数和(自身を含む): 175633920

約数和(自身を除く): 93645992

約数列:

[1, 2, 4, 8, 11, 22, 43, 44, 47, 86, 88, 94, 172, 188, 344, 376, 461, 473, 517, 922, 946, 1034, 1844, 1892, 2021, 2068, 3688, 3784, 4042, 4136, 5071, 8084, 10142, 16168, 19823, 20284, 21667, 22231, 39646, 40568, 43334, 44462, 79292, 86668, 88924, 158584, 173336, 177848, 218053, 238337, 436106, 476674, 872212, 931681, 953348, 1744424, 1863362, 1906696, 3726724, 7453448, 10248491, 20496982, 40993964, 81987928]

約数ペア:

[(1, 81987928), (2, 40993964), (4, 20496982), (8, 10248491), (11, 7453448), (22, 3726724), (43, 1906696), (44, 1863362), (47, 1744424), (86, 953348), (88, 931681), (94, 872212), (172, 476674), (188, 436106), (344, 238337), (376, 218053), (461, 177848), (473, 173336), (517, 158584), (922, 88924), (946, 86668), (1034, 79292), (1844, 44462), (1892, 43334), (2021, 40568), (2068, 39646), (3688, 22231), (3784, 21667), (4042, 20284), (4136, 19823), (5071, 16168), (8084, 10142)]