21387254

素因数分解:

$2^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{35527}}^1$

素因数の和:35579

約数の個数: 16

約数和(自身を含む): 37517568

約数和(自身を除く): 16130314

約数列:

[1, 2, 7, 14, 43, 86, 301, 602, 35527, 71054, 248689, 497378, 1527661, 3055322, 10693627, 21387254]

約数ペア:

[(1, 21387254), (2, 10693627), (7, 3055322), (14, 1527661), (43, 497378), (86, 248689), (301, 71054), (602, 35527)]