18812521

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{4219}}^1$

素因数の和:4253

約数の個数: 16

約数和(自身を含む): 23632000

約数和(自身を除く): 4819479

約数列:

[1, 7, 13, 49, 91, 343, 637, 4219, 4459, 29533, 54847, 206731, 383929, 1447117, 2687503, 18812521]

約数ペア:

[(1, 18812521), (7, 2687503), (13, 1447117), (49, 383929), (91, 206731), (343, 54847), (637, 29533), (4219, 4459)]