21259090

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{57457}}^1$

素因数の和:57501

約数の個数: 16

約数和(自身を含む): 39301272

約数和(自身を除く): 18042182

約数列:

[1, 2, 5, 10, 37, 74, 185, 370, 57457, 114914, 287285, 574570, 2125909, 4251818, 10629545, 21259090]

約数ペア:

[(1, 21259090), (2, 10629545), (5, 4251818), (10, 2125909), (37, 574570), (74, 287285), (185, 114914), (370, 57457)]