19713239

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{4421}}^1$

素因数の和:4455

約数の個数: 16

約数和(自身を含む): 24763200

約数和(自身を除く): 5049961

約数列:

[1, 7, 13, 49, 91, 343, 637, 4421, 4459, 30947, 57473, 216629, 402311, 1516403, 2816177, 19713239]

約数ペア:

[(1, 19713239), (7, 2816177), (13, 1516403), (49, 402311), (91, 216629), (343, 57473), (637, 30947), (4421, 4459)]