18868538

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{42689}}^1$

素因数の和:42721

約数の個数: 16

約数和(自身を含む): 32273640

約数和(自身を除く): 13405102

約数列:

[1, 2, 13, 17, 26, 34, 221, 442, 42689, 85378, 554957, 725713, 1109914, 1451426, 9434269, 18868538]

約数ペア:

[(1, 18868538), (2, 9434269), (13, 1451426), (17, 1109914), (26, 725713), (34, 554957), (221, 85378), (442, 42689)]