18919537

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{4243}}^1$

素因数の和:4277

約数の個数: 16

約数和(自身を含む): 23766400

約数和(自身を除く): 4846863

約数列:

[1, 7, 13, 49, 91, 343, 637, 4243, 4459, 29701, 55159, 207907, 386113, 1455349, 2702791, 18919537]

約数ペア:

[(1, 18919537), (7, 2702791), (13, 1455349), (49, 386113), (91, 207907), (343, 55159), (637, 29701), (4243, 4459)]