21980434

素因数分解:

$2^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{54139}}^1$

素因数の和:54177

約数の個数: 16

約数和(自身を含む): 38980800

約数和(自身を除く): 17000366

約数列:

[1, 2, 7, 14, 29, 58, 203, 406, 54139, 108278, 378973, 757946, 1570031, 3140062, 10990217, 21980434]

約数ペア:

[(1, 21980434), (2, 10990217), (7, 3140062), (14, 1570031), (29, 757946), (58, 378973), (203, 108278), (406, 54139)]