21715928

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{208807}}^1$

素因数の和:208826

約数の個数: 16

約数和(自身を含む): 43849680

約数和(自身を除く): 22133752

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 208807, 417614, 835228, 1670456, 2714491, 5428982, 10857964, 21715928]

約数ペア:

[(1, 21715928), (2, 10857964), (4, 5428982), (8, 2714491), (13, 1670456), (26, 835228), (52, 417614), (104, 208807)]