420800

素因数分解:

$2^6\times 5^2\times {\mathrm{263}}^1$

素因数の和:285

約数の個数: 42

約数和(自身を含む): 1039368

約数和(自身を除く): 618568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 263, 320, 400, 526, 800, 1052, 1315, 1600, 2104, 2630, 4208, 5260, 6575, 8416, 10520, 13150, 16832, 21040, 26300, 42080, 52600, 84160, 105200, 210400, 420800]

約数ペア:

[(1, 420800), (2, 210400), (4, 105200), (5, 84160), (8, 52600), (10, 42080), (16, 26300), (20, 21040), (25, 16832), (32, 13150), (40, 10520), (50, 8416), (64, 6575), (80, 5260), (100, 4208), (160, 2630), (200, 2104), (263, 1600), (320, 1315), (400, 1052), (526, 800)]