19915180

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{9859}}^1$

素因数の和:9969

約数の個数: 24

約数和(自身を含む): 42240240

約数和(自身を除く): 22325060

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 9859, 19718, 39436, 49295, 98590, 197180, 995759, 1991518, 3983036, 4978795, 9957590, 19915180]

約数ペア:

[(1, 19915180), (2, 9957590), (4, 4978795), (5, 3983036), (10, 1991518), (20, 995759), (101, 197180), (202, 98590), (404, 49295), (505, 39436), (1010, 19718), (2020, 9859)]