21880640

素因数分解:

$2^6\times 5^1\times {\mathrm{101}}^1\times {\mathrm{677}}^1$

素因数の和:795

約数の個数: 56

約数和(自身を含む): 52696872

約数和(自身を除く): 30816232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 160, 202, 320, 404, 505, 677, 808, 1010, 1354, 1616, 2020, 2708, 3232, 3385, 4040, 5416, 6464, 6770, 8080, 10832, 13540, 16160, 21664, 27080, 32320, 43328, 54160, 68377, 108320, 136754, 216640, 273508, 341885, 547016, 683770, 1094032, 1367540, 2188064, 2735080, 4376128, 5470160, 10940320, 21880640]

約数ペア:

[(1, 21880640), (2, 10940320), (4, 5470160), (5, 4376128), (8, 2735080), (10, 2188064), (16, 1367540), (20, 1094032), (32, 683770), (40, 547016), (64, 341885), (80, 273508), (101, 216640), (160, 136754), (202, 108320), (320, 68377), (404, 54160), (505, 43328), (677, 32320), (808, 27080), (1010, 21664), (1354, 16160), (1616, 13540), (2020, 10832), (2708, 8080), (3232, 6770), (3385, 6464), (4040, 5416)]