20691885

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19429}}^1$

素因数の和:19508

約数の個数: 16

約数和(自身を含む): 33575040

約数和(自身を除く): 12883155

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19429, 58287, 97145, 291435, 1379459, 4138377, 6897295, 20691885]

約数ペア:

[(1, 20691885), (3, 6897295), (5, 4138377), (15, 1379459), (71, 291435), (213, 97145), (355, 58287), (1065, 19429)]