20217320

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4637}}^1$

素因数の和:4757

約数の個数: 32

約数和(自身を含む): 45916200

約数和(自身を除く): 25698880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4637, 9274, 18548, 23185, 37096, 46370, 92740, 185480, 505433, 1010866, 2021732, 2527165, 4043464, 5054330, 10108660, 20217320]

約数ペア:

[(1, 20217320), (2, 10108660), (4, 5054330), (5, 4043464), (8, 2527165), (10, 2021732), (20, 1010866), (40, 505433), (109, 185480), (218, 92740), (436, 46370), (545, 37096), (872, 23185), (1090, 18548), (2180, 9274), (4360, 4637)]