18705021

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{641}}^1$

素因数の和:852

約数の個数: 16

約数和(自身を含む): 25515648

約数和(自身を除く): 6810627

約数列:

[1, 3, 71, 137, 213, 411, 641, 1923, 9727, 29181, 45511, 87817, 136533, 263451, 6235007, 18705021]

約数ペア:

[(1, 18705021), (3, 6235007), (71, 263451), (137, 136533), (213, 87817), (411, 45511), (641, 29181), (1923, 9727)]