21490985

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1\times {\mathrm{839}}^1$

素因数の和:1000

約数の個数: 16

約数和(自身を含む): 26611200

約数和(自身を除く): 5120215

約数列:

[1, 5, 47, 109, 235, 545, 839, 4195, 5123, 25615, 39433, 91451, 197165, 457255, 4298197, 21490985]

約数ペア:

[(1, 21490985), (5, 4298197), (47, 457255), (109, 197165), (235, 91451), (545, 39433), (839, 25615), (4195, 5123)]