21459412

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{409}}^1\times {\mathrm{1009}}^1$

素因数の和:1435

約数の個数: 24

約数和(自身を含む): 40581800

約数和(自身を除く): 19122388

約数列:

[1, 2, 4, 13, 26, 52, 409, 818, 1009, 1636, 2018, 4036, 5317, 10634, 13117, 21268, 26234, 52468, 412681, 825362, 1650724, 5364853, 10729706, 21459412]

約数ペア:

[(1, 21459412), (2, 10729706), (4, 5364853), (13, 1650724), (26, 825362), (52, 412681), (409, 52468), (818, 26234), (1009, 21268), (1636, 13117), (2018, 10634), (4036, 5317)]