21409828

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{13151}}^1$

素因数の和:13203

約数の個数: 24

約数和(自身を含む): 41981184

約数和(自身を除く): 20571356

約数列:

[1, 2, 4, 11, 22, 37, 44, 74, 148, 407, 814, 1628, 13151, 26302, 52604, 144661, 289322, 486587, 578644, 973174, 1946348, 5352457, 10704914, 21409828]

約数ペア:

[(1, 21409828), (2, 10704914), (4, 5352457), (11, 1946348), (22, 973174), (37, 578644), (44, 486587), (74, 289322), (148, 144661), (407, 52604), (814, 26302), (1628, 13151)]