20989353

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{90863}}^1$

素因数の和:90884

約数の個数: 16

約数和(自身を含む): 34891776

約数和(自身を除く): 13902423

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 90863, 272589, 636041, 999493, 1908123, 2998479, 6996451, 20989353]

約数ペア:

[(1, 20989353), (3, 6996451), (7, 2998479), (11, 1908123), (21, 999493), (33, 636041), (77, 272589), (231, 90863)]