81212215

素因数分解:

$5^1\times 7^1\times {\mathrm{541}}^1\times {\mathrm{4289}}^1$

素因数の和:4842

約数の個数: 16

約数和(自身を含む): 111608640

約数和(自身を除く): 30396425

約数列:

[1, 5, 7, 35, 541, 2705, 3787, 4289, 18935, 21445, 30023, 150115, 2320349, 11601745, 16242443, 81212215]

約数ペア:

[(1, 81212215), (5, 16242443), (7, 11601745), (35, 2320349), (541, 150115), (2705, 30023), (3787, 21445), (4289, 18935)]