31333240

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{18217}}^1$

素因数の和:18271

約数の個数: 32

約数和(自身を含む): 72143280

約数和(自身を除く): 40810040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 18217, 36434, 72868, 91085, 145736, 182170, 364340, 728680, 783331, 1566662, 3133324, 3916655, 6266648, 7833310, 15666620, 31333240]

約数ペア:

[(1, 31333240), (2, 15666620), (4, 7833310), (5, 6266648), (8, 3916655), (10, 3133324), (20, 1566662), (40, 783331), (43, 728680), (86, 364340), (172, 182170), (215, 145736), (344, 91085), (430, 72868), (860, 36434), (1720, 18217)]