1280720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{2287}}^1$

素因数の和:2307

約数の個数: 40

約数和(自身を含む): 3404544

約数和(自身を除く): 2123824

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 2287, 4574, 9148, 11435, 16009, 18296, 22870, 32018, 36592, 45740, 64036, 80045, 91480, 128072, 160090, 182960, 256144, 320180, 640360, 1280720]

約数ペア:

[(1, 1280720), (2, 640360), (4, 320180), (5, 256144), (7, 182960), (8, 160090), (10, 128072), (14, 91480), (16, 80045), (20, 64036), (28, 45740), (35, 36592), (40, 32018), (56, 22870), (70, 18296), (80, 16009), (112, 11435), (140, 9148), (280, 4574), (560, 2287)]