21396578

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{66449}}^1$

素因数の和:66481

約数の個数: 16

約数和(自身を含む): 38275200

約数和(自身を除く): 16878622

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 66449, 132898, 465143, 930286, 1528327, 3056654, 10698289, 21396578]

約数ペア:

[(1, 21396578), (2, 10698289), (7, 3056654), (14, 1528327), (23, 930286), (46, 465143), (161, 132898), (322, 66449)]