18994521

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1697}}^1$

素因数の和:1761

約数の個数: 32

約数和(自身を含む): 31949568

約数和(自身を除く): 12955047

約数列:

[1, 3, 7, 13, 21, 39, 41, 91, 123, 273, 287, 533, 861, 1599, 1697, 3731, 5091, 11193, 11879, 22061, 35637, 66183, 69577, 154427, 208731, 463281, 487039, 904501, 1461117, 2713503, 6331507, 18994521]

約数ペア:

[(1, 18994521), (3, 6331507), (7, 2713503), (13, 1461117), (21, 904501), (39, 487039), (41, 463281), (91, 208731), (123, 154427), (273, 69577), (287, 66183), (533, 35637), (861, 22061), (1599, 11879), (1697, 11193), (3731, 5091)]