20687247

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{8009}}^1$

素因数の和:8063

約数の個数: 24

約数和(自身を含む): 34987680

約数和(自身を除く): 14300433

約数列:

[1, 3, 7, 9, 21, 41, 63, 123, 287, 369, 861, 2583, 8009, 24027, 56063, 72081, 168189, 328369, 504567, 985107, 2298583, 2955321, 6895749, 20687247]

約数ペア:

[(1, 20687247), (3, 6895749), (7, 2955321), (9, 2298583), (21, 985107), (41, 504567), (63, 328369), (123, 168189), (287, 72081), (369, 56063), (861, 24027), (2583, 8009)]