21131404

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{17551}}^1$

素因数の和:17605

約数の個数: 24

約数和(自身を含む): 43248128

約数和(自身を除く): 22116724

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 172, 301, 602, 1204, 17551, 35102, 70204, 122857, 245714, 491428, 754693, 1509386, 3018772, 5282851, 10565702, 21131404]

約数ペア:

[(1, 21131404), (2, 10565702), (4, 5282851), (7, 3018772), (14, 1509386), (28, 754693), (43, 491428), (86, 245714), (172, 122857), (301, 70204), (602, 35102), (1204, 17551)]