19729405

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{613}}^1$

素因数の和:816

約数の個数: 16

約数和(自身を含む): 24447024

約数和(自身を除く): 4717619

約数列:

[1, 5, 41, 157, 205, 613, 785, 3065, 6437, 25133, 32185, 96241, 125665, 481205, 3945881, 19729405]

約数ペア:

[(1, 19729405), (5, 3945881), (41, 481205), (157, 125665), (205, 96241), (613, 32185), (785, 25133), (3065, 6437)]