1285128440

素因数分解:

$2^3\times 5^1\times {\mathrm{32128211}}^1$

素因数の和:32128222

約数の個数: 16

約数和(自身を含む): 2891539080

約数和(自身を除く): 1606410640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 32128211, 64256422, 128512844, 160641055, 257025688, 321282110, 642564220, 1285128440]

約数ペア:

[(1, 1285128440), (2, 642564220), (4, 321282110), (5, 257025688), (8, 160641055), (10, 128512844), (20, 64256422), (40, 32128211)]