20128100

素因数分解:

$2^2\times 5^2\times {\mathrm{201281}}^1$

素因数の和:201295

約数の個数: 18

約数和(自身を含む): 43678194

約数和(自身を除く): 23550094

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 201281, 402562, 805124, 1006405, 2012810, 4025620, 5032025, 10064050, 20128100]

約数ペア:

[(1, 20128100), (2, 10064050), (4, 5032025), (5, 4025620), (10, 2012810), (20, 1006405), (25, 805124), (50, 402562), (100, 201281)]