389134520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{226241}}^1$

素因数の和:226295

約数の個数: 32

約数和(自身を含む): 895918320

約数和(自身を除く): 506783800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 226241, 452482, 904964, 1131205, 1809928, 2262410, 4524820, 9049640, 9728363, 19456726, 38913452, 48641815, 77826904, 97283630, 194567260, 389134520]

約数ペア:

[(1, 389134520), (2, 194567260), (4, 97283630), (5, 77826904), (8, 48641815), (10, 38913452), (20, 19456726), (40, 9728363), (43, 9049640), (86, 4524820), (172, 2262410), (215, 1809928), (344, 1131205), (430, 904964), (860, 452482), (1720, 226241)]