20118987

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{7789}}^1$

素因数の和:7843

約数の個数: 24

約数和(自身を含む): 34026720

約数和(自身を除く): 13907733

約数列:

[1, 3, 7, 9, 21, 41, 63, 123, 287, 369, 861, 2583, 7789, 23367, 54523, 70101, 163569, 319349, 490707, 958047, 2235443, 2874141, 6706329, 20118987]

約数ペア:

[(1, 20118987), (3, 6706329), (7, 2874141), (9, 2235443), (21, 958047), (41, 490707), (63, 319349), (123, 163569), (287, 70101), (369, 54523), (861, 23367), (2583, 7789)]