21137589

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{2399}}^1$

素因数の和:2505

約数の個数: 24

約数和(自身を含む): 33696000

約数和(自身を除く): 12558411

約数列:

[1, 3, 9, 11, 33, 89, 99, 267, 801, 979, 2399, 2937, 7197, 8811, 21591, 26389, 79167, 213511, 237501, 640533, 1921599, 2348621, 7045863, 21137589]

約数ペア:

[(1, 21137589), (3, 7045863), (9, 2348621), (11, 1921599), (33, 640533), (89, 237501), (99, 213511), (267, 79167), (801, 26389), (979, 21591), (2399, 8811), (2937, 7197)]