21810568

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{209717}}^1$

素因数の和:209736

約数の個数: 16

約数和(自身を含む): 44040780

約数和(自身を除く): 22230212

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 209717, 419434, 838868, 1677736, 2726321, 5452642, 10905284, 21810568]

約数ペア:

[(1, 21810568), (2, 10905284), (4, 5452642), (8, 2726321), (13, 1677736), (26, 838868), (52, 419434), (104, 209717)]