864040

素因数分解:

$2^3\times 5^1\times {\mathrm{21601}}^1$

素因数の和:21612

約数の個数: 16

約数和(自身を含む): 1944180

約数和(自身を除く): 1080140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 21601, 43202, 86404, 108005, 172808, 216010, 432020, 864040]

約数ペア:

[(1, 864040), (2, 432020), (4, 216010), (5, 172808), (8, 108005), (10, 86404), (20, 43202), (40, 21601)]