21609581

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{1699}}^1$

素因数の和:1808

約数の個数: 16

約数和(自身を含む): 26112000

約数和(自身を除く): 4502419

約数列:

[1, 7, 23, 79, 161, 553, 1699, 1817, 11893, 12719, 39077, 134221, 273539, 939547, 3087083, 21609581]

約数ペア:

[(1, 21609581), (7, 3087083), (23, 939547), (79, 273539), (161, 134221), (553, 39077), (1699, 12719), (1817, 11893)]