20918000

素因数分解:

$2^4\times 5^3\times {\mathrm{10459}}^1$

素因数の和:10482

約数の個数: 40

約数和(自身を含む): 50584560

約数和(自身を除く): 29666560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 10459, 20918, 41836, 52295, 83672, 104590, 167344, 209180, 261475, 418360, 522950, 836720, 1045900, 1307375, 2091800, 2614750, 4183600, 5229500, 10459000, 20918000]

約数ペア:

[(1, 20918000), (2, 10459000), (4, 5229500), (5, 4183600), (8, 2614750), (10, 2091800), (16, 1307375), (20, 1045900), (25, 836720), (40, 522950), (50, 418360), (80, 261475), (100, 209180), (125, 167344), (200, 104590), (250, 83672), (400, 52295), (500, 41836), (1000, 20918), (2000, 10459)]