81586420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131591}}^1$

素因数の和:131631

約数の個数: 24

約数和(自身を含む): 176859648

約数和(自身を除く): 95273228

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 131591, 263182, 526364, 657955, 1315910, 2631820, 4079321, 8158642, 16317284, 20396605, 40793210, 81586420]

約数ペア:

[(1, 81586420), (2, 40793210), (4, 20396605), (5, 16317284), (10, 8158642), (20, 4079321), (31, 2631820), (62, 1315910), (124, 657955), (155, 526364), (310, 263182), (620, 131591)]