81505255

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{401}}^1$

素因数の和:531

約数の個数: 32

約数和(自身を含む): 109408320

約数和(自身を除く): 27903065

約数列:

[1, 5, 13, 53, 59, 65, 265, 295, 401, 689, 767, 2005, 3127, 3445, 3835, 5213, 15635, 21253, 23659, 26065, 40651, 106265, 118295, 203255, 276289, 307567, 1253927, 1381445, 1537835, 6269635, 16301051, 81505255]

約数ペア:

[(1, 81505255), (5, 16301051), (13, 6269635), (53, 1537835), (59, 1381445), (65, 1253927), (265, 307567), (295, 276289), (401, 203255), (689, 118295), (767, 106265), (2005, 40651), (3127, 26065), (3445, 23659), (3835, 21253), (5213, 15635)]