19980857540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{142720411}}^1$

素因数の和:142720427

約数の個数: 24

約数和(自身を含む): 47954058432

約数和(自身を除く): 27973200892

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 142720411, 285440822, 570881644, 713602055, 999042877, 1427204110, 1998085754, 2854408220, 3996171508, 4995214385, 9990428770, 19980857540]

約数ペア:

[(1, 19980857540), (2, 9990428770), (4, 4995214385), (5, 3996171508), (7, 2854408220), (10, 1998085754), (14, 1427204110), (20, 999042877), (28, 713602055), (35, 570881644), (70, 285440822), (140, 142720411)]