21475795

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20551}}^1$

素因数の和:20586

約数の個数: 16

約数和(自身を含む): 29594880

約数和(自身を除く): 8119085

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20551, 102755, 226061, 390469, 1130305, 1952345, 4295159, 21475795]

約数ペア:

[(1, 21475795), (5, 4295159), (11, 1952345), (19, 1130305), (55, 390469), (95, 226061), (209, 102755), (1045, 20551)]