21259315

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{55219}}^1$

素因数の和:55242

約数の個数: 16

約数和(自身を含む): 31806720

約数和(自身を除く): 10547405

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 55219, 276095, 386533, 607409, 1932665, 3037045, 4251863, 21259315]

約数ペア:

[(1, 21259315), (5, 4251863), (7, 3037045), (11, 1932665), (35, 607409), (55, 386533), (77, 276095), (385, 55219)]