21779405

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{811}}^1$

素因数の和:988

約数の個数: 16

約数和(自身を含む): 27010368

約数和(自身を除く): 5230963

約数列:

[1, 5, 41, 131, 205, 655, 811, 4055, 5371, 26855, 33251, 106241, 166255, 531205, 4355881, 21779405]

約数ペア:

[(1, 21779405), (5, 4355881), (41, 531205), (131, 166255), (205, 106241), (655, 33251), (811, 26855), (4055, 5371)]