21078700

素因数分解:

$2^2\times 5^2\times {\mathrm{101}}^1\times {\mathrm{2087}}^1$

素因数の和:2202

約数の個数: 36

約数和(自身を含む): 46215792

約数和(自身を除く): 25137092

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 101, 202, 404, 505, 1010, 2020, 2087, 2525, 4174, 5050, 8348, 10100, 10435, 20870, 41740, 52175, 104350, 208700, 210787, 421574, 843148, 1053935, 2107870, 4215740, 5269675, 10539350, 21078700]

約数ペア:

[(1, 21078700), (2, 10539350), (4, 5269675), (5, 4215740), (10, 2107870), (20, 1053935), (25, 843148), (50, 421574), (100, 210787), (101, 208700), (202, 104350), (404, 52175), (505, 41740), (1010, 20870), (2020, 10435), (2087, 10100), (2525, 8348), (4174, 5050)]