20971509

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{269}}^1\times {\mathrm{1999}}^1$

素因数の和:2284

約数の個数: 16

約数和(自身を含む): 30240000

約数和(自身を除く): 9268491

約数列:

[1, 3, 13, 39, 269, 807, 1999, 3497, 5997, 10491, 25987, 77961, 537731, 1613193, 6990503, 20971509]

約数ペア:

[(1, 20971509), (3, 6990503), (13, 1613193), (39, 537731), (269, 77961), (807, 25987), (1999, 10491), (3497, 5997)]