81999905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{431}}^1\times {\mathrm{2927}}^1$

素因数の和:3376

約数の個数: 16

約数和(自身を含む): 106251264

約数和(自身を除く): 24251359

約数列:

[1, 5, 13, 65, 431, 2155, 2927, 5603, 14635, 28015, 38051, 190255, 1261537, 6307685, 16399981, 81999905]

約数ペア:

[(1, 81999905), (5, 16399981), (13, 6307685), (65, 1261537), (431, 190255), (2155, 38051), (2927, 28015), (5603, 14635)]