21304129

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{337}}^1\times {\mathrm{821}}^1$

素因数の和:1176

約数の個数: 16

約数和(自身を含む): 26672256

約数和(自身を除く): 5368127

約数列:

[1, 7, 11, 77, 337, 821, 2359, 3707, 5747, 9031, 25949, 63217, 276677, 1936739, 3043447, 21304129]

約数ペア:

[(1, 21304129), (7, 3043447), (11, 1936739), (77, 276677), (337, 63217), (821, 25949), (2359, 9031), (3707, 5747)]