20997914

素因数分解:

$2^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{51719}}^1$

素因数の和:51757

約数の個数: 16

約数和(自身を含む): 37238400

約数和(自身を除く): 16240486

約数列:

[1, 2, 7, 14, 29, 58, 203, 406, 51719, 103438, 362033, 724066, 1499851, 2999702, 10498957, 20997914]

約数ペア:

[(1, 20997914), (2, 10498957), (7, 2999702), (14, 1499851), (29, 724066), (58, 362033), (203, 103438), (406, 51719)]