18855905

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1\times {\mathrm{509}}^1$

素因数の和:784

約数の個数: 16

約数和(自身を含む): 23500800

約数和(自身を除く): 4644895

約数列:

[1, 5, 31, 155, 239, 509, 1195, 2545, 7409, 15779, 37045, 78895, 121651, 608255, 3771181, 18855905]

約数ペア:

[(1, 18855905), (5, 3771181), (31, 608255), (155, 121651), (239, 78895), (509, 37045), (1195, 15779), (2545, 7409)]