20661615

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{193}}^1$

素因数の和:281

約数の個数: 64

約数和(自身を含む): 40414080

約数和(自身を除く): 19752465

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 61, 65, 117, 135, 183, 193, 195, 305, 351, 549, 579, 585, 793, 915, 965, 1647, 1737, 1755, 2379, 2509, 2745, 2895, 3965, 5211, 7137, 7527, 8235, 8685, 11773, 11895, 12545, 21411, 22581, 26055, 35319, 35685, 37635, 58865, 67743, 105957, 107055, 112905, 153049, 176595, 317871, 338715, 459147, 529785, 765245, 1377441, 1589355, 2295735, 4132323, 6887205, 20661615]

約数ペア:

[(1, 20661615), (3, 6887205), (5, 4132323), (9, 2295735), (13, 1589355), (15, 1377441), (27, 765245), (39, 529785), (45, 459147), (61, 338715), (65, 317871), (117, 176595), (135, 153049), (183, 112905), (193, 107055), (195, 105957), (305, 67743), (351, 58865), (549, 37635), (579, 35685), (585, 35319), (793, 26055), (915, 22581), (965, 21411), (1647, 12545), (1737, 11895), (1755, 11773), (2379, 8685), (2509, 8235), (2745, 7527), (2895, 7137), (3965, 5211)]