8991020

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4451}}^1$

素因数の和:4561

約数の個数: 24

約数和(自身を含む): 19072368

約数和(自身を除く): 10081348

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 4451, 8902, 17804, 22255, 44510, 89020, 449551, 899102, 1798204, 2247755, 4495510, 8991020]

約数ペア:

[(1, 8991020), (2, 4495510), (4, 2247755), (5, 1798204), (10, 899102), (20, 449551), (101, 89020), (202, 44510), (404, 22255), (505, 17804), (1010, 8902), (2020, 4451)]