20649440

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{179}}^1$

素因数の和:304

約数の個数: 96

約数和(自身を含む): 56609280

約数和(自身を除く): 35959840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 103, 112, 140, 160, 179, 206, 224, 280, 358, 412, 515, 560, 716, 721, 824, 895, 1030, 1120, 1253, 1432, 1442, 1648, 1790, 2060, 2506, 2864, 2884, 3296, 3580, 3605, 4120, 5012, 5728, 5768, 6265, 7160, 7210, 8240, 10024, 11536, 12530, 14320, 14420, 16480, 18437, 20048, 23072, 25060, 28640, 28840, 36874, 40096, 50120, 57680, 73748, 92185, 100240, 115360, 129059, 147496, 184370, 200480, 258118, 294992, 368740, 516236, 589984, 645295, 737480, 1032472, 1290590, 1474960, 2064944, 2581180, 2949920, 4129888, 5162360, 10324720, 20649440]

約数ペア:

[(1, 20649440), (2, 10324720), (4, 5162360), (5, 4129888), (7, 2949920), (8, 2581180), (10, 2064944), (14, 1474960), (16, 1290590), (20, 1032472), (28, 737480), (32, 645295), (35, 589984), (40, 516236), (56, 368740), (70, 294992), (80, 258118), (103, 200480), (112, 184370), (140, 147496), (160, 129059), (179, 115360), (206, 100240), (224, 92185), (280, 73748), (358, 57680), (412, 50120), (515, 40096), (560, 36874), (716, 28840), (721, 28640), (824, 25060), (895, 23072), (1030, 20048), (1120, 18437), (1253, 16480), (1432, 14420), (1442, 14320), (1648, 12530), (1790, 11536), (2060, 10024), (2506, 8240), (2864, 7210), (2884, 7160), (3296, 6265), (3580, 5768), (3605, 5728), (4120, 5012)]