328820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{401}}^1$

素因数の和:451

約数の個数: 24

約数和(自身を含む): 709128

約数和(自身を除く): 380308

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 401, 410, 802, 820, 1604, 2005, 4010, 8020, 16441, 32882, 65764, 82205, 164410, 328820]

約数ペア:

[(1, 328820), (2, 164410), (4, 82205), (5, 65764), (10, 32882), (20, 16441), (41, 8020), (82, 4010), (164, 2005), (205, 1604), (401, 820), (410, 802)]