20987031

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{17359}}^1$

素因数の和:17406

約数の個数: 16

約数和(自身を含む): 31109120

約数和(自身を除く): 10122089

約数列:

[1, 3, 13, 31, 39, 93, 403, 1209, 17359, 52077, 225667, 538129, 677001, 1614387, 6995677, 20987031]

約数ペア:

[(1, 20987031), (3, 6995677), (13, 1614387), (31, 677001), (39, 538129), (93, 225667), (403, 52077), (1209, 17359)]