19428905

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{3929}}^1$

素因数の和:4000

約数の個数: 16

約数和(自身を含む): 24900480

約数和(自身を除く): 5471575

約数列:

[1, 5, 23, 43, 115, 215, 989, 3929, 4945, 19645, 90367, 168947, 451835, 844735, 3885781, 19428905]

約数ペア:

[(1, 19428905), (5, 3885781), (23, 844735), (43, 451835), (115, 168947), (215, 90367), (989, 19645), (3929, 4945)]