21097540

素因数分解:

$2^2\times 5^1\times {\mathrm{727}}^1\times {\mathrm{1451}}^1$

素因数の和:2187

約数の個数: 24

約数和(自身を含む): 44396352

約数和(自身を除く): 23298812

約数列:

[1, 2, 4, 5, 10, 20, 727, 1451, 1454, 2902, 2908, 3635, 5804, 7255, 7270, 14510, 14540, 29020, 1054877, 2109754, 4219508, 5274385, 10548770, 21097540]

約数ペア:

[(1, 21097540), (2, 10548770), (4, 5274385), (5, 4219508), (10, 2109754), (20, 1054877), (727, 29020), (1451, 14540), (1454, 14510), (2902, 7270), (2908, 7255), (3635, 5804)]