12780261

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{229}}^1$

素因数の和:307

約数の個数: 40

約数和(自身を含む): 21039480

約数和(自身を除く): 8259219

約数列:

[1, 3, 9, 13, 27, 39, 53, 81, 117, 159, 229, 351, 477, 687, 689, 1053, 1431, 2061, 2067, 2977, 4293, 6183, 6201, 8931, 12137, 18549, 18603, 26793, 36411, 55809, 80379, 109233, 157781, 241137, 327699, 473343, 983097, 1420029, 4260087, 12780261]

約数ペア:

[(1, 12780261), (3, 4260087), (9, 1420029), (13, 983097), (27, 473343), (39, 327699), (53, 241137), (81, 157781), (117, 109233), (159, 80379), (229, 55809), (351, 36411), (477, 26793), (687, 18603), (689, 18549), (1053, 12137), (1431, 8931), (2061, 6201), (2067, 6183), (2977, 4293)]