320800

素因数分解:

$2^5\times 5^2\times {\mathrm{401}}^1$

素因数の和:421

約数の個数: 36

約数和(自身を含む): 785106

約数和(自身を除く): 464306

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 401, 800, 802, 1604, 2005, 3208, 4010, 6416, 8020, 10025, 12832, 16040, 20050, 32080, 40100, 64160, 80200, 160400, 320800]

約数ペア:

[(1, 320800), (2, 160400), (4, 80200), (5, 64160), (8, 40100), (10, 32080), (16, 20050), (20, 16040), (25, 12832), (32, 10025), (40, 8020), (50, 6416), (80, 4010), (100, 3208), (160, 2005), (200, 1604), (400, 802), (401, 800)]