81886760

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{20269}}^1$

素因数の和:20381

約数の個数: 32

約数和(自身を含む): 186078600

約数和(自身を除く): 104191840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 20269, 40538, 81076, 101345, 162152, 202690, 405380, 810760, 2047169, 4094338, 8188676, 10235845, 16377352, 20471690, 40943380, 81886760]

約数ペア:

[(1, 81886760), (2, 40943380), (4, 20471690), (5, 16377352), (8, 10235845), (10, 8188676), (20, 4094338), (40, 2047169), (101, 810760), (202, 405380), (404, 202690), (505, 162152), (808, 101345), (1010, 81076), (2020, 40538), (4040, 20269)]