28480880

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1789}}^1$

素因数の和:2001

約数の個数: 40

約数和(自身を含む): 66588000

約数和(自身を除く): 38107120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1592, 1789, 1990, 3184, 3578, 3980, 7156, 7960, 8945, 14312, 15920, 17890, 28624, 35780, 71560, 143120, 356011, 712022, 1424044, 1780055, 2848088, 3560110, 5696176, 7120220, 14240440, 28480880]

約数ペア:

[(1, 28480880), (2, 14240440), (4, 7120220), (5, 5696176), (8, 3560110), (10, 2848088), (16, 1780055), (20, 1424044), (40, 712022), (80, 356011), (199, 143120), (398, 71560), (796, 35780), (995, 28624), (1592, 17890), (1789, 15920), (1990, 14312), (3184, 8945), (3578, 7960), (3980, 7156)]