90909999

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 150698880

約数和(自身を除く): 59788881

約数列:

[1, 3, 9, 17, 27, 37, 51, 53, 101, 111, 153, 159, 303, 333, 459, 477, 629, 901, 909, 999, 1431, 1717, 1887, 1961, 2703, 2727, 3737, 5151, 5353, 5661, 5883, 8109, 11211, 15453, 16059, 16983, 17649, 24327, 33337, 33633, 46359, 48177, 52947, 63529, 91001, 100011, 100899, 144531, 190587, 198061, 273003, 300033, 571761, 594183, 819009, 900099, 1715283, 1782549, 2457027, 3367037, 5347647, 10101111, 30303333, 90909999]

約数ペア:

[(1, 90909999), (3, 30303333), (9, 10101111), (17, 5347647), (27, 3367037), (37, 2457027), (51, 1782549), (53, 1715283), (101, 900099), (111, 819009), (153, 594183), (159, 571761), (303, 300033), (333, 273003), (459, 198061), (477, 190587), (629, 144531), (901, 100899), (909, 100011), (999, 91001), (1431, 63529), (1717, 52947), (1887, 48177), (1961, 46359), (2703, 33633), (2727, 33337), (3737, 24327), (5151, 17649), (5353, 16983), (5661, 16059), (5883, 15453), (8109, 11211)]