19908640

素因数分解:

$2^5\times 5^1\times {\mathrm{124429}}^1$

素因数の和:124444

約数の個数: 24

約数和(自身を含む): 47034540

約数和(自身を除く): 27125900

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 124429, 248858, 497716, 622145, 995432, 1244290, 1990864, 2488580, 3981728, 4977160, 9954320, 19908640]

約数ペア:

[(1, 19908640), (2, 9954320), (4, 4977160), (5, 3981728), (8, 2488580), (10, 1990864), (16, 1244290), (20, 995432), (32, 622145), (40, 497716), (80, 248858), (160, 124429)]