21135961

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{14447}}^1$

素因数の和:14484

約数の個数: 16

約数和(自身を含む): 27740160

約数和(自身を除く): 6604199

約数列:

[1, 7, 11, 19, 77, 133, 209, 1463, 14447, 101129, 158917, 274493, 1112419, 1921451, 3019423, 21135961]

約数ペア:

[(1, 21135961), (7, 3019423), (11, 1921451), (19, 1112419), (77, 274493), (133, 158917), (209, 101129), (1463, 14447)]