21306865

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{439}}^1\times {\mathrm{571}}^1$

素因数の和:1032

約数の個数: 16

約数和(自身を含む): 27181440

約数和(自身を除く): 5874575

約数列:

[1, 5, 17, 85, 439, 571, 2195, 2855, 7463, 9707, 37315, 48535, 250669, 1253345, 4261373, 21306865]

約数ペア:

[(1, 21306865), (5, 4261373), (17, 1253345), (85, 250669), (439, 48535), (571, 37315), (2195, 9707), (2855, 7463)]