20921740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149441}}^1$

素因数の和:149457

約数の個数: 24

約数和(自身を含む): 50212512

約数和(自身を除く): 29290772

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149441, 298882, 597764, 747205, 1046087, 1494410, 2092174, 2988820, 4184348, 5230435, 10460870, 20921740]

約数ペア:

[(1, 20921740), (2, 10460870), (4, 5230435), (5, 4184348), (7, 2988820), (10, 2092174), (14, 1494410), (20, 1046087), (28, 747205), (35, 597764), (70, 298882), (140, 149441)]