20380919

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{491}}^1$

素因数の和:638

約数の個数: 16

約数和(自身を含む): 22923264

約数和(自身を除く): 2542345

約数列:

[1, 13, 31, 103, 403, 491, 1339, 3193, 6383, 15221, 41509, 50573, 197873, 657449, 1567763, 20380919]

約数ペア:

[(1, 20380919), (13, 1567763), (31, 657449), (103, 197873), (403, 50573), (491, 41509), (1339, 15221), (3193, 6383)]