128779780

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{39503}}^1$

素因数の和:39675

約数の個数: 24

約数和(自身を含む): 272103552

約数和(自身を除く): 143323772

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 39503, 79006, 158012, 197515, 395030, 790060, 6438989, 12877978, 25755956, 32194945, 64389890, 128779780]

約数ペア:

[(1, 128779780), (2, 64389890), (4, 32194945), (5, 25755956), (10, 12877978), (20, 6438989), (163, 790060), (326, 395030), (652, 197515), (815, 158012), (1630, 79006), (3260, 39503)]