18994095

素因数分解:

$3^9\times 5^1\times {\mathrm{193}}^1$

素因数の和:225

約数の個数: 40

約数和(自身を含む): 34365936

約数和(自身を除く): 15371841

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 193, 243, 405, 579, 729, 965, 1215, 1737, 2187, 2895, 3645, 5211, 6561, 8685, 10935, 15633, 19683, 26055, 32805, 46899, 78165, 98415, 140697, 234495, 422091, 703485, 1266273, 2110455, 3798819, 6331365, 18994095]

約数ペア:

[(1, 18994095), (3, 6331365), (5, 3798819), (9, 2110455), (15, 1266273), (27, 703485), (45, 422091), (81, 234495), (135, 140697), (193, 98415), (243, 78165), (405, 46899), (579, 32805), (729, 26055), (965, 19683), (1215, 15633), (1737, 10935), (2187, 8685), (2895, 6561), (3645, 5211)]