18822280

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{499}}^1$

素因数の和:574

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 26537720

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 41, 46, 82, 92, 115, 164, 184, 205, 230, 328, 410, 460, 499, 820, 920, 943, 998, 1640, 1886, 1996, 2495, 3772, 3992, 4715, 4990, 7544, 9430, 9980, 11477, 18860, 19960, 20459, 22954, 37720, 40918, 45908, 57385, 81836, 91816, 102295, 114770, 163672, 204590, 229540, 409180, 459080, 470557, 818360, 941114, 1882228, 2352785, 3764456, 4705570, 9411140, 18822280]

約数ペア:

[(1, 18822280), (2, 9411140), (4, 4705570), (5, 3764456), (8, 2352785), (10, 1882228), (20, 941114), (23, 818360), (40, 470557), (41, 459080), (46, 409180), (82, 229540), (92, 204590), (115, 163672), (164, 114770), (184, 102295), (205, 91816), (230, 81836), (328, 57385), (410, 45908), (460, 40918), (499, 37720), (820, 22954), (920, 20459), (943, 19960), (998, 18860), (1640, 11477), (1886, 9980), (1996, 9430), (2495, 7544), (3772, 4990), (3992, 4715)]