19997019

素因数分解:

$3^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{2423}}^1$

素因数の和:2567

約数の個数: 24

約数和(自身を含む): 33276672

約数和(自身を除く): 13279653

約数列:

[1, 3, 7, 9, 21, 63, 131, 393, 917, 1179, 2423, 2751, 7269, 8253, 16961, 21807, 50883, 152649, 317413, 952239, 2221891, 2856717, 6665673, 19997019]

約数ペア:

[(1, 19997019), (3, 6665673), (7, 2856717), (9, 2221891), (21, 952239), (63, 317413), (131, 152649), (393, 50883), (917, 21807), (1179, 16961), (2423, 8253), (2751, 7269)]