20989263

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{269}}^1\times {\mathrm{839}}^1$

素因数の和:1142

約数の個数: 16

約数和(自身を含む): 29030400

約数和(自身を除く): 8041137

約数列:

[1, 3, 31, 93, 269, 807, 839, 2517, 8339, 25017, 26009, 78027, 225691, 677073, 6996421, 20989263]

約数ペア:

[(1, 20989263), (3, 6996421), (31, 677073), (93, 225691), (269, 78027), (807, 26009), (839, 25017), (2517, 8339)]