21049810

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51341}}^1$

素因数の和:51389

約数の個数: 16

約数和(自身を含む): 38814552

約数和(自身を除く): 17764742

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51341, 102682, 256705, 513410, 2104981, 4209962, 10524905, 21049810]

約数ペア:

[(1, 21049810), (2, 10524905), (5, 4209962), (10, 2104981), (41, 513410), (82, 256705), (205, 102682), (410, 51341)]