20531979

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13499}}^1$

素因数の和:13531

約数の個数: 18

約数和(自身を含む): 32116500

約数和(自身を除く): 11584521

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13499, 40497, 121491, 175487, 526461, 1579383, 2281331, 6843993, 20531979]

約数ペア:

[(1, 20531979), (3, 6843993), (9, 2281331), (13, 1579383), (39, 526461), (117, 175487), (169, 121491), (507, 40497), (1521, 13499)]