81991540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{95339}}^1$

素因数の和:95391

約数の個数: 24

約数和(自身を含む): 176188320

約数和(自身を除く): 94196780

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 95339, 190678, 381356, 476695, 953390, 1906780, 4099577, 8199154, 16398308, 20497885, 40995770, 81991540]

約数ペア:

[(1, 81991540), (2, 40995770), (4, 20497885), (5, 16398308), (10, 8199154), (20, 4099577), (43, 1906780), (86, 953390), (172, 476695), (215, 381356), (430, 190678), (860, 95339)]