19721859

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1\times {\mathrm{1301}}^1$

素因数の和:1498

約数の個数: 16

約数和(自身を含む): 27331584

約数和(自身を除く): 7609725

約数列:

[1, 3, 31, 93, 163, 489, 1301, 3903, 5053, 15159, 40331, 120993, 212063, 636189, 6573953, 19721859]

約数ペア:

[(1, 19721859), (3, 6573953), (31, 636189), (93, 212063), (163, 120993), (489, 40331), (1301, 15159), (3903, 5053)]