19904269

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{11239}}^1$

素因数の和:11280

約数の個数: 16

約数和(自身を含む): 25896960

約数和(自身を除く): 5992691

約数列:

[1, 7, 11, 23, 77, 161, 253, 1771, 11239, 78673, 123629, 258497, 865403, 1809479, 2843467, 19904269]

約数ペア:

[(1, 19904269), (7, 2843467), (11, 1809479), (23, 865403), (77, 258497), (161, 123629), (253, 78673), (1771, 11239)]