18911815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{2221}}^1$

素因数の和:2370

約数の個数: 16

約数和(自身を含む): 24637536

約数和(自身を除く): 5725721

約数列:

[1, 5, 13, 65, 131, 655, 1703, 2221, 8515, 11105, 28873, 144365, 290951, 1454755, 3782363, 18911815]

約数ペア:

[(1, 18911815), (5, 3782363), (13, 1454755), (65, 290951), (131, 144365), (655, 28873), (1703, 11105), (2221, 8515)]