80213920

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:278

約数の個数: 96

約数和(自身を含む): 197588160

約数和(自身を除く): 117374240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 89, 131, 160, 172, 178, 215, 262, 344, 356, 430, 445, 524, 655, 688, 712, 860, 890, 1048, 1310, 1376, 1424, 1720, 1780, 2096, 2620, 2848, 3440, 3560, 3827, 4192, 5240, 5633, 6880, 7120, 7654, 10480, 11266, 11659, 14240, 15308, 19135, 20960, 22532, 23318, 28165, 30616, 38270, 45064, 46636, 56330, 58295, 61232, 76540, 90128, 93272, 112660, 116590, 122464, 153080, 180256, 186544, 225320, 233180, 306160, 373088, 450640, 466360, 501337, 612320, 901280, 932720, 1002674, 1865440, 2005348, 2506685, 4010696, 5013370, 8021392, 10026740, 16042784, 20053480, 40106960, 80213920]

約数ペア:

[(1, 80213920), (2, 40106960), (4, 20053480), (5, 16042784), (8, 10026740), (10, 8021392), (16, 5013370), (20, 4010696), (32, 2506685), (40, 2005348), (43, 1865440), (80, 1002674), (86, 932720), (89, 901280), (131, 612320), (160, 501337), (172, 466360), (178, 450640), (215, 373088), (262, 306160), (344, 233180), (356, 225320), (430, 186544), (445, 180256), (524, 153080), (655, 122464), (688, 116590), (712, 112660), (860, 93272), (890, 90128), (1048, 76540), (1310, 61232), (1376, 58295), (1424, 56330), (1720, 46636), (1780, 45064), (2096, 38270), (2620, 30616), (2848, 28165), (3440, 23318), (3560, 22532), (3827, 20960), (4192, 19135), (5240, 15308), (5633, 14240), (6880, 11659), (7120, 11266), (7654, 10480)]