21402885

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1979}}^1$

素因数の和:2097

約数の個数: 32

約数和(自身を含む): 39536640

約数和(自身を除く): 18133755

約数列:

[1, 3, 5, 7, 15, 21, 35, 103, 105, 309, 515, 721, 1545, 1979, 2163, 3605, 5937, 9895, 10815, 13853, 29685, 41559, 69265, 203837, 207795, 611511, 1019185, 1426859, 3057555, 4280577, 7134295, 21402885]

約数ペア:

[(1, 21402885), (3, 7134295), (5, 4280577), (7, 3057555), (15, 1426859), (21, 1019185), (35, 611511), (103, 207795), (105, 203837), (309, 69265), (515, 41559), (721, 29685), (1545, 13853), (1979, 10815), (2163, 9895), (3605, 5937)]