30981520

素因数分解:

$2^4\times 5^1\times {\mathrm{387269}}^1$

素因数の和:387282

約数の個数: 20

約数和(自身を含む): 72032220

約数和(自身を除く): 41050700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 387269, 774538, 1549076, 1936345, 3098152, 3872690, 6196304, 7745380, 15490760, 30981520]

約数ペア:

[(1, 30981520), (2, 15490760), (4, 7745380), (5, 6196304), (8, 3872690), (10, 3098152), (16, 1936345), (20, 1549076), (40, 774538), (80, 387269)]