21581228

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{317371}}^1$

素因数の和:317392

約数の個数: 12

約数和(自身を含む): 39988872

約数和(自身を除く): 18407644

約数列:

[1, 2, 4, 17, 34, 68, 317371, 634742, 1269484, 5395307, 10790614, 21581228]

約数ペア:

[(1, 21581228), (2, 10790614), (4, 5395307), (17, 1269484), (34, 634742), (68, 317371)]