81105020

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{40151}}^1$

素因数の和:40261

約数の個数: 24

約数和(自身を含む): 172011168

約数和(自身を除く): 90906148

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 40151, 80302, 160604, 200755, 401510, 803020, 4055251, 8110502, 16221004, 20276255, 40552510, 81105020]

約数ペア:

[(1, 81105020), (2, 40552510), (4, 20276255), (5, 16221004), (10, 8110502), (20, 4055251), (101, 803020), (202, 401510), (404, 200755), (505, 160604), (1010, 80302), (2020, 40151)]