9001960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{499}}^1$

素因数の和:562

約数の個数: 64

約数和(自身を含む): 22680000

約数和(自身を除く): 13678040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 499, 820, 902, 998, 1640, 1804, 1996, 2255, 2495, 3608, 3992, 4510, 4990, 5489, 9020, 9980, 10978, 18040, 19960, 20459, 21956, 27445, 40918, 43912, 54890, 81836, 102295, 109780, 163672, 204590, 219560, 225049, 409180, 450098, 818360, 900196, 1125245, 1800392, 2250490, 4500980, 9001960]

約数ペア:

[(1, 9001960), (2, 4500980), (4, 2250490), (5, 1800392), (8, 1125245), (10, 900196), (11, 818360), (20, 450098), (22, 409180), (40, 225049), (41, 219560), (44, 204590), (55, 163672), (82, 109780), (88, 102295), (110, 81836), (164, 54890), (205, 43912), (220, 40918), (328, 27445), (410, 21956), (440, 20459), (451, 19960), (499, 18040), (820, 10978), (902, 9980), (998, 9020), (1640, 5489), (1804, 4990), (1996, 4510), (2255, 3992), (2495, 3608)]