21581276

素因数分解:

$2^2\times {\mathrm{101}}^1\times {\mathrm{53419}}^1$

素因数の和:53524

約数の個数: 12

約数和(自身を含む): 38141880

約数和(自身を除く): 16560604

約数列:

[1, 2, 4, 101, 202, 404, 53419, 106838, 213676, 5395319, 10790638, 21581276]

約数ペア:

[(1, 21581276), (2, 10790638), (4, 5395319), (101, 213676), (202, 106838), (404, 53419)]