21380165

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1\times {\mathrm{479}}^1$

素因数の和:676

約数の個数: 16

約数和(自身を含む): 26265600

約数和(自身を除く): 4885435

約数列:

[1, 5, 79, 113, 395, 479, 565, 2395, 8927, 37841, 44635, 54127, 189205, 270635, 4276033, 21380165]

約数ペア:

[(1, 21380165), (5, 4276033), (79, 270635), (113, 189205), (395, 54127), (479, 44635), (565, 37841), (2395, 8927)]