21904407

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{9397}}^1$

素因数の和:9447

約数の個数: 24

約数和(自身を含む): 37140896

約数和(自身を除く): 15236489

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 259, 333, 777, 2331, 9397, 28191, 65779, 84573, 197337, 347689, 592011, 1043067, 2433823, 3129201, 7301469, 21904407]

約数ペア:

[(1, 21904407), (3, 7301469), (7, 3129201), (9, 2433823), (21, 1043067), (37, 592011), (63, 347689), (111, 197337), (259, 84573), (333, 65779), (777, 28191), (2331, 9397)]