21057760

素因数分解:

$2^5\times 5^1\times {\mathrm{131611}}^1$

素因数の和:131626

約数の個数: 24

約数和(自身を含む): 49749336

約数和(自身を除く): 28691576

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 131611, 263222, 526444, 658055, 1052888, 1316110, 2105776, 2632220, 4211552, 5264440, 10528880, 21057760]

約数ペア:

[(1, 21057760), (2, 10528880), (4, 5264440), (5, 4211552), (8, 2632220), (10, 2105776), (16, 1316110), (20, 1052888), (32, 658055), (40, 526444), (80, 263222), (160, 131611)]