161671280

素因数分解:

$2^4\times 5^1\times {\mathrm{2020891}}^1$

素因数の和:2020904

約数の個数: 20

約数和(自身を含む): 375885912

約数和(自身を除く): 214214632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2020891, 4041782, 8083564, 10104455, 16167128, 20208910, 32334256, 40417820, 80835640, 161671280]

約数ペア:

[(1, 161671280), (2, 80835640), (4, 40417820), (5, 32334256), (8, 20208910), (10, 16167128), (16, 10104455), (20, 8083564), (40, 4041782), (80, 2020891)]