261644859

素因数分解:

$3^2\times 7^3\times {\mathrm{131}}^1\times {\mathrm{647}}^1$

素因数の和:805

約数の個数: 48

約数和(自身を含む): 444787200

約数和(自身を除く): 183142341

約数列:

[1, 3, 7, 9, 21, 49, 63, 131, 147, 343, 393, 441, 647, 917, 1029, 1179, 1941, 2751, 3087, 4529, 5823, 6419, 8253, 13587, 19257, 31703, 40761, 44933, 57771, 84757, 95109, 134799, 221921, 254271, 285327, 404397, 593299, 665763, 762813, 1779897, 1997289, 4153093, 5339691, 12459279, 29071651, 37377837, 87214953, 261644859]

約数ペア:

[(1, 261644859), (3, 87214953), (7, 37377837), (9, 29071651), (21, 12459279), (49, 5339691), (63, 4153093), (131, 1997289), (147, 1779897), (343, 762813), (393, 665763), (441, 593299), (647, 404397), (917, 285327), (1029, 254271), (1179, 221921), (1941, 134799), (2751, 95109), (3087, 84757), (4529, 57771), (5823, 44933), (6419, 40761), (8253, 31703), (13587, 19257)]