3947980

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1811}}^1$

素因数の和:1929

約数の個数: 24

約数和(自身を含む): 8371440

約数和(自身を除く): 4423460

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 1811, 2180, 3622, 7244, 9055, 18110, 36220, 197399, 394798, 789596, 986995, 1973990, 3947980]

約数ペア:

[(1, 3947980), (2, 1973990), (4, 986995), (5, 789596), (10, 394798), (20, 197399), (109, 36220), (218, 18110), (436, 9055), (545, 7244), (1090, 3622), (1811, 2180)]