20993427

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{25633}}^1$

素因数の和:25659

約数の個数: 24

約数和(自身を含む): 37323104

約数和(自身を除く): 16329677

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 25633, 76899, 179431, 230697, 333229, 538293, 999687, 1614879, 2332603, 2999061, 6997809, 20993427]

約数ペア:

[(1, 20993427), (3, 6997809), (7, 2999061), (9, 2332603), (13, 1614879), (21, 999687), (39, 538293), (63, 333229), (91, 230697), (117, 179431), (273, 76899), (819, 25633)]