858280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{499}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 1980000

約数和(自身を除く): 1121720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 499, 860, 998, 1720, 1996, 2495, 3992, 4990, 9980, 19960, 21457, 42914, 85828, 107285, 171656, 214570, 429140, 858280]

約数ペア:

[(1, 858280), (2, 429140), (4, 214570), (5, 171656), (8, 107285), (10, 85828), (20, 42914), (40, 21457), (43, 19960), (86, 9980), (172, 4990), (215, 3992), (344, 2495), (430, 1996), (499, 1720), (860, 998)]