871280

素因数分解:

$2^4\times 5^1\times {\mathrm{10891}}^1$

素因数の和:10904

約数の個数: 20

約数和(自身を含む): 2025912

約数和(自身を除く): 1154632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 10891, 21782, 43564, 54455, 87128, 108910, 174256, 217820, 435640, 871280]

約数ペア:

[(1, 871280), (2, 435640), (4, 217820), (5, 174256), (8, 108910), (10, 87128), (16, 54455), (20, 43564), (40, 21782), (80, 10891)]