21805765

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1\times {\mathrm{379}}^1$

素因数の和:732

約数の個数: 16

約数和(自身を含む): 27031680

約数和(自身を除く): 5225915

約数列:

[1, 5, 37, 185, 311, 379, 1555, 1895, 11507, 14023, 57535, 70115, 117869, 589345, 4361153, 21805765]

約数ペア:

[(1, 21805765), (5, 4361153), (37, 589345), (185, 117869), (311, 70115), (379, 57535), (1555, 14023), (1895, 11507)]