28507280

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{8287}}^1$

素因数の和:8343

約数の個数: 40

約数和(自身を含む): 67828992

約数和(自身を除く): 39321712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 8287, 16574, 33148, 41435, 66296, 82870, 132592, 165740, 331480, 356341, 662960, 712682, 1425364, 1781705, 2850728, 3563410, 5701456, 7126820, 14253640, 28507280]

約数ペア:

[(1, 28507280), (2, 14253640), (4, 7126820), (5, 5701456), (8, 3563410), (10, 2850728), (16, 1781705), (20, 1425364), (40, 712682), (43, 662960), (80, 356341), (86, 331480), (172, 165740), (215, 132592), (344, 82870), (430, 66296), (688, 41435), (860, 33148), (1720, 16574), (3440, 8287)]