20988591

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31657}}^1$

素因数の和:31690

約数の個数: 16

約数和(自身を含む): 31911264

約数和(自身を除く): 10922673

約数列:

[1, 3, 13, 17, 39, 51, 221, 663, 31657, 94971, 411541, 538169, 1234623, 1614507, 6996197, 20988591]

約数ペア:

[(1, 20988591), (3, 6996197), (13, 1614507), (17, 1234623), (39, 538169), (51, 411541), (221, 94971), (663, 31657)]