20640897

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{6353}}^1$

素因数の和:6397

約数の個数: 18

約数和(自身を含む): 31471362

約数和(自身を除く): 10830465

約数列:

[1, 3, 9, 19, 57, 171, 361, 1083, 3249, 6353, 19059, 57177, 120707, 362121, 1086363, 2293433, 6880299, 20640897]

約数ペア:

[(1, 20640897), (3, 6880299), (9, 2293433), (19, 1086363), (57, 362121), (171, 120707), (361, 57177), (1083, 19059), (3249, 6353)]