21891653

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{227}}^1\times {\mathrm{599}}^1$

素因数の和:856

約数の個数: 16

約数和(自身を含む): 26265600

約数和(自身を除く): 4373947

約数列:

[1, 7, 23, 161, 227, 599, 1589, 4193, 5221, 13777, 36547, 96439, 135973, 951811, 3127379, 21891653]

約数ペア:

[(1, 21891653), (7, 3127379), (23, 951811), (161, 135973), (227, 96439), (599, 36547), (1589, 13777), (4193, 5221)]