4891008020

素因数分解:

$2^2\times 5^1\times {\mathrm{244550401}}^1$

素因数の和:244550410

約数の個数: 12

約数和(自身を含む): 10271116884

約数和(自身を除く): 5380108864

約数列:

[1, 2, 4, 5, 10, 20, 244550401, 489100802, 978201604, 1222752005, 2445504010, 4891008020]

約数ペア:

[(1, 4891008020), (2, 2445504010), (4, 1222752005), (5, 978201604), (10, 489100802), (20, 244550401)]