20643280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{193}}^1$

素因数の和:404

約数の個数: 80

約数和(自身を含む): 55425024

約数和(自身を除く): 34781744

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 191, 193, 280, 382, 386, 560, 764, 772, 955, 965, 1337, 1351, 1528, 1544, 1910, 1930, 2674, 2702, 3056, 3088, 3820, 3860, 5348, 5404, 6685, 6755, 7640, 7720, 10696, 10808, 13370, 13510, 15280, 15440, 21392, 21616, 26740, 27020, 36863, 53480, 54040, 73726, 106960, 108080, 147452, 184315, 258041, 294904, 368630, 516082, 589808, 737260, 1032164, 1290205, 1474520, 2064328, 2580410, 2949040, 4128656, 5160820, 10321640, 20643280]

約数ペア:

[(1, 20643280), (2, 10321640), (4, 5160820), (5, 4128656), (7, 2949040), (8, 2580410), (10, 2064328), (14, 1474520), (16, 1290205), (20, 1032164), (28, 737260), (35, 589808), (40, 516082), (56, 368630), (70, 294904), (80, 258041), (112, 184315), (140, 147452), (191, 108080), (193, 106960), (280, 73726), (382, 54040), (386, 53480), (560, 36863), (764, 27020), (772, 26740), (955, 21616), (965, 21392), (1337, 15440), (1351, 15280), (1528, 13510), (1544, 13370), (1910, 10808), (1930, 10696), (2674, 7720), (2702, 7640), (3056, 6755), (3088, 6685), (3820, 5404), (3860, 5348)]