20532880

素因数分解:

$2^4\times 5^1\times {\mathrm{256661}}^1$

素因数の和:256674

約数の個数: 20

約数和(自身を含む): 47739132

約数和(自身を除く): 27206252

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256661, 513322, 1026644, 1283305, 2053288, 2566610, 4106576, 5133220, 10266440, 20532880]

約数ペア:

[(1, 20532880), (2, 10266440), (4, 5133220), (5, 4106576), (8, 2566610), (10, 2053288), (16, 1283305), (20, 1026644), (40, 513322), (80, 256661)]