161440

素因数分解:

$2^5\times 5^1\times {\mathrm{1009}}^1$

素因数の和:1024

約数の個数: 24

約数和(自身を含む): 381780

約数和(自身を除く): 220340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 1009, 2018, 4036, 5045, 8072, 10090, 16144, 20180, 32288, 40360, 80720, 161440]

約数ペア:

[(1, 161440), (2, 80720), (4, 40360), (5, 32288), (8, 20180), (10, 16144), (16, 10090), (20, 8072), (32, 5045), (40, 4036), (80, 2018), (160, 1009)]