20397969

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{647}}^1$

素因数の和:797

約数の個数: 24

約数和(自身を含む): 30730752

約数和(自身を除く): 10332783

約数列:

[1, 3, 9, 31, 93, 113, 279, 339, 647, 1017, 1941, 3503, 5823, 10509, 20057, 31527, 60171, 73111, 180513, 219333, 657999, 2266441, 6799323, 20397969]

約数ペア:

[(1, 20397969), (3, 6799323), (9, 2266441), (31, 657999), (93, 219333), (113, 180513), (279, 73111), (339, 60171), (647, 31527), (1017, 20057), (1941, 10509), (3503, 5823)]