21658905

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6779}}^1$

素因数の和:6861

約数の個数: 24

約数和(自身を含む): 38076480

約数和(自身を除く): 16417575

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6779, 20337, 33895, 61011, 101685, 305055, 481309, 1443927, 2406545, 4331781, 7219635, 21658905]

約数ペア:

[(1, 21658905), (3, 7219635), (5, 4331781), (9, 2406545), (15, 1443927), (45, 481309), (71, 305055), (213, 101685), (355, 61011), (639, 33895), (1065, 20337), (3195, 6779)]