261647178

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1\times {\mathrm{433}}^1$

素因数の和:639

約数の個数: 64

約数和(自身を含む): 578629632

約数和(自身を除く): 316982454

約数列:

[1, 2, 3, 6, 13, 26, 39, 61, 78, 122, 127, 183, 254, 366, 381, 433, 762, 793, 866, 1299, 1586, 1651, 2379, 2598, 3302, 4758, 4953, 5629, 7747, 9906, 11258, 15494, 16887, 23241, 26413, 33774, 46482, 52826, 54991, 79239, 100711, 109982, 158478, 164973, 201422, 302133, 329946, 343369, 604266, 686738, 714883, 1030107, 1429766, 2060214, 2144649, 3354451, 4289298, 6708902, 10063353, 20126706, 43607863, 87215726, 130823589, 261647178]

約数ペア:

[(1, 261647178), (2, 130823589), (3, 87215726), (6, 43607863), (13, 20126706), (26, 10063353), (39, 6708902), (61, 4289298), (78, 3354451), (122, 2144649), (127, 2060214), (183, 1429766), (254, 1030107), (366, 714883), (381, 686738), (433, 604266), (762, 343369), (793, 329946), (866, 302133), (1299, 201422), (1586, 164973), (1651, 158478), (2379, 109982), (2598, 100711), (3302, 79239), (4758, 54991), (4953, 52826), (5629, 46482), (7747, 33774), (9906, 26413), (11258, 23241), (15494, 16887)]