21880145

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^2\times {\mathrm{283}}^1$

素因数の和:389

約数の個数: 24

約数和(自身を含む): 30767424

約数和(自身を除く): 8887279

約数列:

[1, 5, 7, 35, 47, 235, 283, 329, 1415, 1645, 1981, 2209, 9905, 11045, 13301, 15463, 66505, 77315, 93107, 465535, 625147, 3125735, 4376029, 21880145]

約数ペア:

[(1, 21880145), (5, 4376029), (7, 3125735), (35, 625147), (47, 465535), (235, 93107), (283, 77315), (329, 66505), (1415, 15463), (1645, 13301), (1981, 11045), (2209, 9905)]