21691887

素因数分解:

$3^1\times 7^1\times {\mathrm{631}}^1\times {\mathrm{1637}}^1$

素因数の和:2278

約数の個数: 16

約数和(自身を含む): 33126912

約数和(自身を除く): 11435025

約数列:

[1, 3, 7, 21, 631, 1637, 1893, 4417, 4911, 11459, 13251, 34377, 1032947, 3098841, 7230629, 21691887]

約数ペア:

[(1, 21691887), (3, 7230629), (7, 3098841), (21, 1032947), (631, 34377), (1637, 13251), (1893, 11459), (4417, 4911)]