21135317

素因数分解:

$7^3\times {\mathrm{43}}^1\times {\mathrm{1433}}^1$

素因数の和:1497

約数の個数: 16

約数和(自身を含む): 25238400

約数和(自身を除く): 4103083

約数列:

[1, 7, 43, 49, 301, 343, 1433, 2107, 10031, 14749, 61619, 70217, 431333, 491519, 3019331, 21135317]

約数ペア:

[(1, 21135317), (7, 3019331), (43, 491519), (49, 431333), (301, 70217), (343, 61619), (1433, 14749), (2107, 10031)]