20991543

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{281}}^1\times {\mathrm{673}}^1$

素因数の和:994

約数の個数: 16

約数和(自身を含む): 28890336

約数和(自身を除く): 7898793

約数列:

[1, 3, 37, 111, 281, 673, 843, 2019, 10397, 24901, 31191, 74703, 189113, 567339, 6997181, 20991543]

約数ペア:

[(1, 20991543), (3, 6997181), (37, 567339), (111, 189113), (281, 74703), (673, 31191), (843, 24901), (2019, 10397)]