20464379

素因数分解:

${\mathrm{13}}^2\times {\mathrm{17}}^2\times {\mathrm{419}}^1$

素因数の和:479

約数の個数: 18

約数和(自身を含む): 23596020

約数和(自身を除く): 3131641

約数列:

[1, 13, 17, 169, 221, 289, 419, 2873, 3757, 5447, 7123, 48841, 70811, 92599, 121091, 1203787, 1574183, 20464379]

約数ペア:

[(1, 20464379), (13, 1574183), (17, 1203787), (169, 121091), (221, 92599), (289, 70811), (419, 48841), (2873, 7123), (3757, 5447)]