18216913

素因数分解:

${\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{313}}^1$

素因数の和:385

約数の個数: 24

約数和(自身を含む): 22217384

約数和(自身を除く): 4000471

約数列:

[1, 11, 13, 37, 121, 143, 313, 407, 481, 1573, 3443, 4069, 4477, 5291, 11581, 37873, 44759, 58201, 127391, 150553, 492349, 1401301, 1656083, 18216913]

約数ペア:

[(1, 18216913), (11, 1656083), (13, 1401301), (37, 492349), (121, 150553), (143, 127391), (313, 58201), (407, 44759), (481, 37873), (1573, 11581), (3443, 5291), (4069, 4477)]