20918585

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{431}}^1\times {\mathrm{571}}^1$

素因数の和:1024

約数の個数: 16

約数和(自身を含む): 26687232

約数和(自身を除く): 5768647

約数列:

[1, 5, 17, 85, 431, 571, 2155, 2855, 7327, 9707, 36635, 48535, 246101, 1230505, 4183717, 20918585]

約数ペア:

[(1, 20918585), (5, 4183717), (17, 1230505), (85, 246101), (431, 48535), (571, 36635), (2155, 9707), (2855, 7327)]