21139928

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{64451}}^1$

素因数の和:64498

約数の個数: 16

約数和(自身を含む): 40604760

約数和(自身を除く): 19464832

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 64451, 128902, 257804, 515608, 2642491, 5284982, 10569964, 21139928]

約数ペア:

[(1, 21139928), (2, 10569964), (4, 5284982), (8, 2642491), (41, 515608), (82, 257804), (164, 128902), (328, 64451)]