1280468480

素因数分解:

$2^9\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2539}}^1$

素因数の和:2759

約数の個数: 80

約数和(自身を含む): 3086922960

約数和(自身を除く): 1806454480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 197, 256, 320, 394, 512, 640, 788, 985, 1280, 1576, 1970, 2539, 2560, 3152, 3940, 5078, 6304, 7880, 10156, 12608, 12695, 15760, 20312, 25216, 25390, 31520, 40624, 50432, 50780, 63040, 81248, 100864, 101560, 126080, 162496, 203120, 252160, 324992, 406240, 500183, 504320, 649984, 812480, 1000366, 1299968, 1624960, 2000732, 2500915, 3249920, 4001464, 5001830, 6499840, 8002928, 10003660, 16005856, 20007320, 32011712, 40014640, 64023424, 80029280, 128046848, 160058560, 256093696, 320117120, 640234240, 1280468480]

約数ペア:

[(1, 1280468480), (2, 640234240), (4, 320117120), (5, 256093696), (8, 160058560), (10, 128046848), (16, 80029280), (20, 64023424), (32, 40014640), (40, 32011712), (64, 20007320), (80, 16005856), (128, 10003660), (160, 8002928), (197, 6499840), (256, 5001830), (320, 4001464), (394, 3249920), (512, 2500915), (640, 2000732), (788, 1624960), (985, 1299968), (1280, 1000366), (1576, 812480), (1970, 649984), (2539, 504320), (2560, 500183), (3152, 406240), (3940, 324992), (5078, 252160), (6304, 203120), (7880, 162496), (10156, 126080), (12608, 101560), (12695, 100864), (15760, 81248), (20312, 63040), (25216, 50780), (25390, 50432), (31520, 40624)]