21378872

素因数分解:

$2^3\times {\mathrm{101}}^1\times {\mathrm{26459}}^1$

素因数の和:26566

約数の個数: 16

約数和(自身を含む): 40483800

約数和(自身を除く): 19104928

約数列:

[1, 2, 4, 8, 101, 202, 404, 808, 26459, 52918, 105836, 211672, 2672359, 5344718, 10689436, 21378872]

約数ペア:

[(1, 21378872), (2, 10689436), (4, 5344718), (8, 2672359), (101, 211672), (202, 105836), (404, 52918), (808, 26459)]