256863280

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{347}}^1\times {\mathrm{487}}^1$

素因数の和:866

約数の個数: 80

約数和(自身を含む): 631745280

約数和(自身を除く): 374882000

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 347, 380, 487, 694, 760, 974, 1388, 1520, 1735, 1948, 2435, 2776, 3470, 3896, 4870, 5552, 6593, 6940, 7792, 9253, 9740, 13186, 13880, 18506, 19480, 26372, 27760, 32965, 37012, 38960, 46265, 52744, 65930, 74024, 92530, 105488, 131860, 148048, 168989, 185060, 263720, 337978, 370120, 527440, 675956, 740240, 844945, 1351912, 1689890, 2703824, 3210791, 3379780, 6421582, 6759560, 12843164, 13519120, 16053955, 25686328, 32107910, 51372656, 64215820, 128431640, 256863280]

約数ペア:

[(1, 256863280), (2, 128431640), (4, 64215820), (5, 51372656), (8, 32107910), (10, 25686328), (16, 16053955), (19, 13519120), (20, 12843164), (38, 6759560), (40, 6421582), (76, 3379780), (80, 3210791), (95, 2703824), (152, 1689890), (190, 1351912), (304, 844945), (347, 740240), (380, 675956), (487, 527440), (694, 370120), (760, 337978), (974, 263720), (1388, 185060), (1520, 168989), (1735, 148048), (1948, 131860), (2435, 105488), (2776, 92530), (3470, 74024), (3896, 65930), (4870, 52744), (5552, 46265), (6593, 38960), (6940, 37012), (7792, 32965), (9253, 27760), (9740, 26372), (13186, 19480), (13880, 18506)]