20428865

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{227}}^1\times {\mathrm{439}}^1$

素因数の和:712

約数の個数: 16

約数和(自身を含む): 25280640

約数和(自身を除く): 4851775

約数列:

[1, 5, 41, 205, 227, 439, 1135, 2195, 9307, 17999, 46535, 89995, 99653, 498265, 4085773, 20428865]

約数ペア:

[(1, 20428865), (5, 4085773), (41, 498265), (205, 99653), (227, 89995), (439, 46535), (1135, 17999), (2195, 9307)]