19906315

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{2531}}^1$

素因数の和:2571

約数の個数: 24

約数和(自身を含む): 28287504

約数和(自身を除く): 8381189

約数列:

[1, 5, 11, 13, 55, 65, 121, 143, 605, 715, 1573, 2531, 7865, 12655, 27841, 32903, 139205, 164515, 306251, 361933, 1531255, 1809665, 3981263, 19906315]

約数ペア:

[(1, 19906315), (5, 3981263), (11, 1809665), (13, 1531255), (55, 361933), (65, 306251), (121, 164515), (143, 139205), (605, 32903), (715, 27841), (1573, 12655), (2531, 7865)]