12721905

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{40387}}^1$

素因数の和:40405

約数の個数: 24

約数和(自身を含む): 25202112

約数和(自身を除く): 12480207

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 40387, 121161, 201935, 282709, 363483, 605805, 848127, 1413545, 1817415, 2544381, 4240635, 12721905]

約数ペア:

[(1, 12721905), (3, 4240635), (5, 2544381), (7, 1817415), (9, 1413545), (15, 848127), (21, 605805), (35, 363483), (45, 282709), (63, 201935), (105, 121161), (315, 40387)]