21991528

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{211457}}^1$

素因数の和:211476

約数の個数: 16

約数和(自身を含む): 44406180

約数和(自身を除く): 22414652

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 211457, 422914, 845828, 1691656, 2748941, 5497882, 10995764, 21991528]

約数ペア:

[(1, 21991528), (2, 10995764), (4, 5497882), (8, 2748941), (13, 1691656), (26, 845828), (52, 422914), (104, 211457)]