21457268

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{18691}}^1$

素因数の和:18743

約数の個数: 24

約数和(自身を含む): 43963584

約数和(自身を除く): 22506316

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 18691, 37382, 74764, 130837, 261674, 523348, 766331, 1532662, 3065324, 5364317, 10728634, 21457268]

約数ペア:

[(1, 21457268), (2, 10728634), (4, 5364317), (7, 3065324), (14, 1532662), (28, 766331), (41, 523348), (82, 261674), (164, 130837), (287, 74764), (574, 37382), (1148, 18691)]