20905555

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{10273}}^1$

素因数の和:10326

約数の個数: 16

約数和(自身を含む): 28109664

約数和(自身を除く): 7204109

約数列:

[1, 5, 11, 37, 55, 185, 407, 2035, 10273, 51365, 113003, 380101, 565015, 1900505, 4181111, 20905555]

約数ペア:

[(1, 20905555), (5, 4181111), (11, 1900505), (37, 565015), (55, 380101), (185, 113003), (407, 51365), (2035, 10273)]