21805329

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79873}}^1$

素因数の和:79896

約数の個数: 16

約数和(自身を含む): 35783552

約数和(自身を除く): 13978223

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 79873, 239619, 559111, 1038349, 1677333, 3115047, 7268443, 21805329]

約数ペア:

[(1, 21805329), (3, 7268443), (7, 3115047), (13, 1677333), (21, 1038349), (39, 559111), (91, 239619), (273, 79873)]