21910405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{3041}}^1$

素因数の和:3188

約数の個数: 16

約数和(自身を含む): 28911168

約数和(自身を除く): 7000763

約数列:

[1, 5, 11, 55, 131, 655, 1441, 3041, 7205, 15205, 33451, 167255, 398371, 1991855, 4382081, 21910405]

約数ペア:

[(1, 21910405), (5, 4382081), (11, 1991855), (55, 398371), (131, 167255), (655, 33451), (1441, 15205), (3041, 7205)]