21487137

素因数分解:

$3^1\times 7^2\times {\mathrm{313}}^1\times {\mathrm{467}}^1$

素因数の和:797

約数の個数: 24

約数和(自身を含む): 33505056

約数和(自身を除く): 12017919

約数列:

[1, 3, 7, 21, 49, 147, 313, 467, 939, 1401, 2191, 3269, 6573, 9807, 15337, 22883, 46011, 68649, 146171, 438513, 1023197, 3069591, 7162379, 21487137]

約数ペア:

[(1, 21487137), (3, 7162379), (7, 3069591), (21, 1023197), (49, 438513), (147, 146171), (313, 68649), (467, 46011), (939, 22883), (1401, 15337), (2191, 9807), (3269, 6573)]