21088888

素因数分解:

$2^3\times {\mathrm{509}}^1\times {\mathrm{5179}}^1$

素因数の和:5694

約数の個数: 16

約数和(自身を含む): 39627000

約数和(自身を除く): 18538112

約数列:

[1, 2, 4, 8, 509, 1018, 2036, 4072, 5179, 10358, 20716, 41432, 2636111, 5272222, 10544444, 21088888]

約数ペア:

[(1, 21088888), (2, 10544444), (4, 5272222), (8, 2636111), (509, 41432), (1018, 20716), (2036, 10358), (4072, 5179)]