81286840

素因数分解:

$2^3\times 5^1\times {\mathrm{2032171}}^1$

素因数の和:2032182

約数の個数: 16

約数和(自身を含む): 182895480

約数和(自身を除く): 101608640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2032171, 4064342, 8128684, 10160855, 16257368, 20321710, 40643420, 81286840]

約数ペア:

[(1, 81286840), (2, 40643420), (4, 20321710), (5, 16257368), (8, 10160855), (10, 8128684), (20, 4064342), (40, 2032171)]