81990018

素因数分解:

$2^1\times 3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:288

約数の個数: 96

約数和(自身を含む): 203860800

約数和(自身を除く): 121870782

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 29, 33, 58, 66, 87, 99, 109, 131, 174, 198, 218, 261, 262, 319, 327, 393, 522, 638, 654, 786, 957, 981, 1179, 1199, 1441, 1914, 1962, 2358, 2398, 2871, 2882, 3161, 3597, 3799, 4323, 5742, 6322, 7194, 7598, 8646, 9483, 10791, 11397, 12969, 14279, 18966, 21582, 22794, 25938, 28449, 28558, 34191, 34771, 41789, 42837, 56898, 68382, 69542, 83578, 85674, 104313, 125367, 128511, 157069, 208626, 250734, 257022, 312939, 314138, 376101, 414091, 471207, 625878, 752202, 828182, 942414, 1242273, 1413621, 2484546, 2827242, 3726819, 4555001, 7453638, 9110002, 13665003, 27330006, 40995009, 81990018]

約数ペア:

[(1, 81990018), (2, 40995009), (3, 27330006), (6, 13665003), (9, 9110002), (11, 7453638), (18, 4555001), (22, 3726819), (29, 2827242), (33, 2484546), (58, 1413621), (66, 1242273), (87, 942414), (99, 828182), (109, 752202), (131, 625878), (174, 471207), (198, 414091), (218, 376101), (261, 314138), (262, 312939), (319, 257022), (327, 250734), (393, 208626), (522, 157069), (638, 128511), (654, 125367), (786, 104313), (957, 85674), (981, 83578), (1179, 69542), (1199, 68382), (1441, 56898), (1914, 42837), (1962, 41789), (2358, 34771), (2398, 34191), (2871, 28558), (2882, 28449), (3161, 25938), (3597, 22794), (3799, 21582), (4323, 18966), (5742, 14279), (6322, 12969), (7194, 11397), (7598, 10791), (8646, 9483)]