12643281

素因数分解:

$3^2\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1987}}^1$

素因数の和:2101

約数の個数: 24

約数和(自身を含む): 21088704

約数和(自身を除く): 8445423

約数列:

[1, 3, 7, 9, 21, 63, 101, 303, 707, 909, 1987, 2121, 5961, 6363, 13909, 17883, 41727, 125181, 200687, 602061, 1404809, 1806183, 4214427, 12643281]

約数ペア:

[(1, 12643281), (3, 4214427), (7, 1806183), (9, 1404809), (21, 602061), (63, 200687), (101, 125181), (303, 41727), (707, 17883), (909, 13909), (1987, 6363), (2121, 5961)]