400540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{2861}}^1$

素因数の和:2877

約数の個数: 24

約数和(自身を含む): 961632

約数和(自身を除く): 561092

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 2861, 5722, 11444, 14305, 20027, 28610, 40054, 57220, 80108, 100135, 200270, 400540]

約数ペア:

[(1, 400540), (2, 200270), (4, 100135), (5, 80108), (7, 57220), (10, 40054), (14, 28610), (20, 20027), (28, 14305), (35, 11444), (70, 5722), (140, 2861)]