81188320

素因数分解:

$2^5\times 5^1\times {\mathrm{557}}^1\times {\mathrm{911}}^1$

素因数の和:1483

約数の個数: 48

約数和(自身を含む): 192362688

約数和(自身を除く): 111174368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 557, 911, 1114, 1822, 2228, 2785, 3644, 4456, 4555, 5570, 7288, 8912, 9110, 11140, 14576, 17824, 18220, 22280, 29152, 36440, 44560, 72880, 89120, 145760, 507427, 1014854, 2029708, 2537135, 4059416, 5074270, 8118832, 10148540, 16237664, 20297080, 40594160, 81188320]

約数ペア:

[(1, 81188320), (2, 40594160), (4, 20297080), (5, 16237664), (8, 10148540), (10, 8118832), (16, 5074270), (20, 4059416), (32, 2537135), (40, 2029708), (80, 1014854), (160, 507427), (557, 145760), (911, 89120), (1114, 72880), (1822, 44560), (2228, 36440), (2785, 29152), (3644, 22280), (4456, 18220), (4555, 17824), (5570, 14576), (7288, 11140), (8912, 9110)]