21392847

素因数分解:

$3^2\times 7^1\times {\mathrm{241}}^1\times {\mathrm{1409}}^1$

素因数の和:1663

約数の個数: 24

約数和(自身を含む): 35486880

約数和(自身を除く): 14094033

約数列:

[1, 3, 7, 9, 21, 63, 241, 723, 1409, 1687, 2169, 4227, 5061, 9863, 12681, 15183, 29589, 88767, 339569, 1018707, 2376983, 3056121, 7130949, 21392847]

約数ペア:

[(1, 21392847), (3, 7130949), (7, 3056121), (9, 2376983), (21, 1018707), (63, 339569), (241, 88767), (723, 29589), (1409, 15183), (1687, 12681), (2169, 9863), (4227, 5061)]