18139555

素因数分解:

$5^1\times 7^4\times {\mathrm{1511}}^1$

素因数の和:1544

約数の個数: 20

約数和(自身を含む): 25410672

約数和(自身を除く): 7271117

約数列:

[1, 5, 7, 35, 49, 245, 343, 1511, 1715, 2401, 7555, 10577, 12005, 52885, 74039, 370195, 518273, 2591365, 3627911, 18139555]

約数ペア:

[(1, 18139555), (5, 3627911), (7, 2591365), (35, 518273), (49, 370195), (245, 74039), (343, 52885), (1511, 12005), (1715, 10577), (2401, 7555)]