21911188

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{32413}}^1$

素因数の和:32443

約数の個数: 18

約数和(自身を含む): 41522334

約数和(自身を除く): 19611146

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 32413, 64826, 129652, 421369, 842738, 1685476, 5477797, 10955594, 21911188]

約数ペア:

[(1, 21911188), (2, 10955594), (4, 5477797), (13, 1685476), (26, 842738), (52, 421369), (169, 129652), (338, 64826), (676, 32413)]