12721821

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{2339}}^1$

素因数の和:2393

約数の個数: 24

約数和(自身を含む): 20273760

約数和(自身を除く): 7551939

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 2339, 5439, 7017, 16373, 49119, 86543, 114611, 259629, 343833, 605801, 1817403, 4240607, 12721821]

約数ペア:

[(1, 12721821), (3, 4240607), (7, 1817403), (21, 605801), (37, 343833), (49, 259629), (111, 114611), (147, 86543), (259, 49119), (777, 16373), (1813, 7017), (2339, 5439)]