21504909

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{211}}^1\times {\mathrm{641}}^1$

素因数の和:908

約数の個数: 16

約数和(自身を含む): 29398464

約数和(自身を除く): 7893555

約数列:

[1, 3, 53, 159, 211, 633, 641, 1923, 11183, 33549, 33973, 101919, 135251, 405753, 7168303, 21504909]

約数ペア:

[(1, 21504909), (3, 7168303), (53, 405753), (159, 135251), (211, 101919), (633, 33973), (641, 33549), (1923, 11183)]