21000978849

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{1109}}^1\times {\mathrm{371311}}^1$

素因数の和:372440

約数の個数: 16

約数和(自身を含む): 29675255040

約数和(自身を除く): 8674276191

約数列:

[1, 3, 17, 51, 1109, 3327, 18853, 56559, 371311, 1113933, 6312287, 18936861, 411783899, 1235351697, 7000326283, 21000978849]

約数ペア:

[(1, 21000978849), (3, 7000326283), (17, 1235351697), (51, 411783899), (1109, 18936861), (3327, 6312287), (18853, 1113933), (56559, 371311)]