21390782

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{66431}}^1$

素因数の和:66463

約数の個数: 16

約数和(自身を含む): 38264832

約数和(自身を除く): 16874050

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 66431, 132862, 465017, 930034, 1527913, 3055826, 10695391, 21390782]

約数ペア:

[(1, 21390782), (2, 10695391), (7, 3055826), (14, 1527913), (23, 930034), (46, 465017), (161, 132862), (322, 66431)]