20557405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{2689}}^1$

素因数の和:2844

約数の個数: 16

約数和(自身を含む): 27115200

約数和(自身を除く): 6557795

約数列:

[1, 5, 11, 55, 139, 695, 1529, 2689, 7645, 13445, 29579, 147895, 373771, 1868855, 4111481, 20557405]

約数ペア:

[(1, 20557405), (5, 4111481), (11, 1868855), (55, 373771), (139, 147895), (695, 29579), (1529, 13445), (2689, 7645)]