18440019

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 31030272

約数和(自身を除く): 12590253

約数列:

[1, 3, 9, 13, 17, 39, 51, 73, 117, 127, 153, 219, 221, 381, 657, 663, 949, 1143, 1241, 1651, 1989, 2159, 2847, 3723, 4953, 6477, 8541, 9271, 11169, 14859, 16133, 19431, 27813, 28067, 48399, 83439, 84201, 120523, 145197, 157607, 252603, 361569, 472821, 1084707, 1418463, 2048891, 6146673, 18440019]

約数ペア:

[(1, 18440019), (3, 6146673), (9, 2048891), (13, 1418463), (17, 1084707), (39, 472821), (51, 361569), (73, 252603), (117, 157607), (127, 145197), (153, 120523), (219, 84201), (221, 83439), (381, 48399), (657, 28067), (663, 27813), (949, 19431), (1143, 16133), (1241, 14859), (1651, 11169), (1989, 9271), (2159, 8541), (2847, 6477), (3723, 4953)]