21889399

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{1721}}^1$

素因数の和:1830

約数の個数: 16

約数和(自身を含む): 26449920

約数和(自身を除く): 4560521

約数列:

[1, 7, 23, 79, 161, 553, 1721, 1817, 12047, 12719, 39583, 135959, 277081, 951713, 3127057, 21889399]

約数ペア:

[(1, 21889399), (7, 3127057), (23, 951713), (79, 277081), (161, 135959), (553, 39583), (1721, 12719), (1817, 12047)]