256437760

素因数分解:

$2^9\times 5^1\times {\mathrm{109}}^1\times {\mathrm{919}}^1$

素因数の和:1051

約数の個数: 80

約数和(自身を含む): 621165600

約数和(自身を除く): 364727840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 109, 128, 160, 218, 256, 320, 436, 512, 545, 640, 872, 919, 1090, 1280, 1744, 1838, 2180, 2560, 3488, 3676, 4360, 4595, 6976, 7352, 8720, 9190, 13952, 14704, 17440, 18380, 27904, 29408, 34880, 36760, 55808, 58816, 69760, 73520, 100171, 117632, 139520, 147040, 200342, 235264, 279040, 294080, 400684, 470528, 500855, 588160, 801368, 1001710, 1176320, 1602736, 2003420, 2352640, 3205472, 4006840, 6410944, 8013680, 12821888, 16027360, 25643776, 32054720, 51287552, 64109440, 128218880, 256437760]

約数ペア:

[(1, 256437760), (2, 128218880), (4, 64109440), (5, 51287552), (8, 32054720), (10, 25643776), (16, 16027360), (20, 12821888), (32, 8013680), (40, 6410944), (64, 4006840), (80, 3205472), (109, 2352640), (128, 2003420), (160, 1602736), (218, 1176320), (256, 1001710), (320, 801368), (436, 588160), (512, 500855), (545, 470528), (640, 400684), (872, 294080), (919, 279040), (1090, 235264), (1280, 200342), (1744, 147040), (1838, 139520), (2180, 117632), (2560, 100171), (3488, 73520), (3676, 69760), (4360, 58816), (4595, 55808), (6976, 36760), (7352, 34880), (8720, 29408), (9190, 27904), (13952, 18380), (14704, 17440)]