21086781

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{271}}^1\times {\mathrm{701}}^1$

素因数の和:1012

約数の個数: 16

約数和(自身を含む): 29023488

約数和(自身を除く): 7936707

約数列:

[1, 3, 37, 111, 271, 701, 813, 2103, 10027, 25937, 30081, 77811, 189971, 569913, 7028927, 21086781]

約数ペア:

[(1, 21086781), (3, 7028927), (37, 569913), (111, 189971), (271, 77811), (701, 30081), (813, 25937), (2103, 10027)]