655861648

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{499}}^1$

素因数の和:680

約数の個数: 80

約数和(自身を含む): 1406160000

約数和(自身を除く): 750298352

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 71, 89, 104, 142, 178, 208, 284, 356, 499, 568, 712, 923, 998, 1136, 1157, 1424, 1846, 1996, 2314, 3692, 3992, 4628, 6319, 6487, 7384, 7984, 9256, 12638, 12974, 14768, 18512, 25276, 25948, 35429, 44411, 50552, 51896, 70858, 82147, 88822, 101104, 103792, 141716, 164294, 177644, 283432, 328588, 355288, 460577, 566864, 577343, 657176, 710576, 921154, 1154686, 1314352, 1842308, 2309372, 3153181, 3684616, 4618744, 6306362, 7369232, 9237488, 12612724, 25225448, 40991353, 50450896, 81982706, 163965412, 327930824, 655861648]

約数ペア:

[(1, 655861648), (2, 327930824), (4, 163965412), (8, 81982706), (13, 50450896), (16, 40991353), (26, 25225448), (52, 12612724), (71, 9237488), (89, 7369232), (104, 6306362), (142, 4618744), (178, 3684616), (208, 3153181), (284, 2309372), (356, 1842308), (499, 1314352), (568, 1154686), (712, 921154), (923, 710576), (998, 657176), (1136, 577343), (1157, 566864), (1424, 460577), (1846, 355288), (1996, 328588), (2314, 283432), (3692, 177644), (3992, 164294), (4628, 141716), (6319, 103792), (6487, 101104), (7384, 88822), (7984, 82147), (9256, 70858), (12638, 51896), (12974, 50552), (14768, 44411), (18512, 35429), (25276, 25948)]