21451340

素因数分解:

$2^2\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{1063}}^1$

素因数の和:2081

約数の個数: 24

約数和(自身を含む): 45134880

約数和(自身を除く): 23683540

約数列:

[1, 2, 4, 5, 10, 20, 1009, 1063, 2018, 2126, 4036, 4252, 5045, 5315, 10090, 10630, 20180, 21260, 1072567, 2145134, 4290268, 5362835, 10725670, 21451340]

約数ペア:

[(1, 21451340), (2, 10725670), (4, 5362835), (5, 4290268), (10, 2145134), (20, 1072567), (1009, 21260), (1063, 20180), (2018, 10630), (2126, 10090), (4036, 5315), (4252, 5045)]