21031984

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{35527}}^1$

素因数の和:35572

約数の個数: 20

約数和(自身を含む): 41851984

約数和(自身を除く): 20820000

約数列:

[1, 2, 4, 8, 16, 37, 74, 148, 296, 592, 35527, 71054, 142108, 284216, 568432, 1314499, 2628998, 5257996, 10515992, 21031984]

約数ペア:

[(1, 21031984), (2, 10515992), (4, 5257996), (8, 2628998), (16, 1314499), (37, 568432), (74, 284216), (148, 142108), (296, 71054), (592, 35527)]