18870189

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:341

約数の個数: 32

約数和(自身を含む): 28680960

約数和(自身を除く): 9810771

約数列:

[1, 3, 13, 23, 39, 69, 109, 193, 299, 327, 579, 897, 1417, 2507, 2509, 4251, 4439, 7521, 7527, 13317, 21037, 32591, 57707, 63111, 97773, 173121, 273481, 483851, 820443, 1451553, 6290063, 18870189]

約数ペア:

[(1, 18870189), (3, 6290063), (13, 1451553), (23, 820443), (39, 483851), (69, 273481), (109, 173121), (193, 97773), (299, 63111), (327, 57707), (579, 32591), (897, 21037), (1417, 13317), (2507, 7527), (2509, 7521), (4251, 4439)]