81252580

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{39443}}^1$

素因数の和:39555

約数の個数: 24

約数和(自身を含む): 172291392

約数和(自身を除く): 91038812

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 39443, 78886, 157772, 197215, 394430, 788860, 4062629, 8125258, 16250516, 20313145, 40626290, 81252580]

約数ペア:

[(1, 81252580), (2, 40626290), (4, 20313145), (5, 16250516), (10, 8125258), (20, 4062629), (103, 788860), (206, 394430), (412, 197215), (515, 157772), (1030, 78886), (2060, 39443)]