21402003

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{173}}^1$

素因数の和:363

約数の個数: 32

約数和(自身を含む): 33808896

約数和(自身を除く): 12406893

約数列:

[1, 3, 7, 21, 43, 129, 137, 173, 301, 411, 519, 903, 959, 1211, 2877, 3633, 5891, 7439, 17673, 22317, 23701, 41237, 52073, 71103, 123711, 156219, 165907, 497721, 1019143, 3057429, 7134001, 21402003]

約数ペア:

[(1, 21402003), (3, 7134001), (7, 3057429), (21, 1019143), (43, 497721), (129, 165907), (137, 156219), (173, 123711), (301, 71103), (411, 52073), (519, 41237), (903, 23701), (959, 22317), (1211, 17673), (2877, 7439), (3633, 5891)]