81970040

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47657}}^1$

素因数の和:47711

約数の個数: 32

約数和(自身を含む): 188725680

約数和(自身を除く): 106755640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 47657, 95314, 190628, 238285, 381256, 476570, 953140, 1906280, 2049251, 4098502, 8197004, 10246255, 16394008, 20492510, 40985020, 81970040]

約数ペア:

[(1, 81970040), (2, 40985020), (4, 20492510), (5, 16394008), (8, 10246255), (10, 8197004), (20, 4098502), (40, 2049251), (43, 1906280), (86, 953140), (172, 476570), (215, 381256), (344, 238285), (430, 190628), (860, 95314), (1720, 47657)]