1281320

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{311}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 2920320

約数和(自身を除く): 1639000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 311, 412, 515, 622, 824, 1030, 1244, 1555, 2060, 2488, 3110, 4120, 6220, 12440, 32033, 64066, 128132, 160165, 256264, 320330, 640660, 1281320]

約数ペア:

[(1, 1281320), (2, 640660), (4, 320330), (5, 256264), (8, 160165), (10, 128132), (20, 64066), (40, 32033), (103, 12440), (206, 6220), (311, 4120), (412, 3110), (515, 2488), (622, 2060), (824, 1555), (1030, 1244)]