39982000

素因数分解:

$2^4\times 5^3\times {\mathrm{19991}}^1$

素因数の和:20014

約数の個数: 40

約数和(自身を含む): 96681312

約数和(自身を除く): 56699312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 19991, 39982, 79964, 99955, 159928, 199910, 319856, 399820, 499775, 799640, 999550, 1599280, 1999100, 2498875, 3998200, 4997750, 7996400, 9995500, 19991000, 39982000]

約数ペア:

[(1, 39982000), (2, 19991000), (4, 9995500), (5, 7996400), (8, 4997750), (10, 3998200), (16, 2498875), (20, 1999100), (25, 1599280), (40, 999550), (50, 799640), (80, 499775), (100, 399820), (125, 319856), (200, 199910), (250, 159928), (400, 99955), (500, 79964), (1000, 39982), (2000, 19991)]