19990257

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{30707}}^1$

素因数の和:30748

約数の個数: 16

約数和(自身を含む): 31444992

約数和(自身を除く): 11454735

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 30707, 92121, 214949, 644847, 951917, 2855751, 6663419, 19990257]

約数ペア:

[(1, 19990257), (3, 6663419), (7, 2855751), (21, 951917), (31, 644847), (93, 214949), (217, 92121), (651, 30707)]