138777620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{169241}}^1$

素因数の和:169291

約数の個数: 24

約数和(自身を含む): 298542888

約数和(自身を除く): 159765268

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 169241, 338482, 676964, 846205, 1692410, 3384820, 6938881, 13877762, 27755524, 34694405, 69388810, 138777620]

約数ペア:

[(1, 138777620), (2, 69388810), (4, 34694405), (5, 27755524), (10, 13877762), (20, 6938881), (41, 3384820), (82, 1692410), (164, 846205), (205, 676964), (410, 338482), (820, 169241)]