818360

素因数分解:

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

素因数の和:551

約数の個数: 32

約数和(自身を含む): 1890000

約数和(自身を除く): 1071640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 499, 820, 998, 1640, 1996, 2495, 3992, 4990, 9980, 19960, 20459, 40918, 81836, 102295, 163672, 204590, 409180, 818360]

約数ペア:

[(1, 818360), (2, 409180), (4, 204590), (5, 163672), (8, 102295), (10, 81836), (20, 40918), (40, 20459), (41, 19960), (82, 9980), (164, 4990), (205, 3992), (328, 2495), (410, 1996), (499, 1640), (820, 998)]