19905710

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{16451}}^1$

素因数の和:16480

約数の個数: 24

約数和(自身を含む): 39386088

約数和(自身を除く): 19480378

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, 1210, 16451, 32902, 82255, 164510, 180961, 361922, 904805, 1809610, 1990571, 3981142, 9952855, 19905710]

約数ペア:

[(1, 19905710), (2, 9952855), (5, 3981142), (10, 1990571), (11, 1809610), (22, 904805), (55, 361922), (110, 180961), (121, 164510), (242, 82255), (605, 32902), (1210, 16451)]