20957307

素因数分解:

$3^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{9689}}^1$

素因数の和:9802

約数の個数: 16

約数和(自身を含む): 32248320

約数和(自身を除く): 11291013

約数列:

[1, 3, 7, 21, 103, 309, 721, 2163, 9689, 29067, 67823, 203469, 997967, 2993901, 6985769, 20957307]

約数ペア:

[(1, 20957307), (3, 6985769), (7, 2993901), (21, 997967), (103, 203469), (309, 67823), (721, 29067), (2163, 9689)]