21390069

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{7561}}^1$

素因数の和:7628

約数の個数: 16

約数和(自身を含む): 30489984

約数和(自身を除く): 9099915

約数列:

[1, 3, 23, 41, 69, 123, 943, 2829, 7561, 22683, 173903, 310001, 521709, 930003, 7130023, 21390069]

約数ペア:

[(1, 21390069), (3, 7130023), (23, 930003), (41, 521709), (69, 310001), (123, 173903), (943, 22683), (2829, 7561)]