21112156

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31231}}^1$

素因数の和:31261

約数の個数: 18

約数和(自身を含む): 40008192

約数和(自身を除く): 18896036

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 31231, 62462, 124924, 406003, 812006, 1624012, 5278039, 10556078, 21112156]

約数ペア:

[(1, 21112156), (2, 10556078), (4, 5278039), (13, 1624012), (26, 812006), (52, 406003), (169, 124924), (338, 62462), (676, 31231)]