2781945

素因数分解:

$3^4\times 5^1\times {\mathrm{6869}}^1$

素因数の和:6886

約数の個数: 20

約数和(自身を含む): 4987620

約数和(自身を除く): 2205675

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 6869, 20607, 34345, 61821, 103035, 185463, 309105, 556389, 927315, 2781945]

約数ペア:

[(1, 2781945), (3, 927315), (5, 556389), (9, 309105), (15, 185463), (27, 103035), (45, 61821), (81, 34345), (135, 20607), (405, 6869)]