20570480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{337}}^1$

素因数の和:466

約数の個数: 80

約数和(自身を含む): 55323840

約数和(自身を除く): 34753360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 109, 112, 140, 218, 280, 337, 436, 545, 560, 674, 763, 872, 1090, 1348, 1526, 1685, 1744, 2180, 2359, 2696, 3052, 3370, 3815, 4360, 4718, 5392, 6104, 6740, 7630, 8720, 9436, 11795, 12208, 13480, 15260, 18872, 23590, 26960, 30520, 36733, 37744, 47180, 61040, 73466, 94360, 146932, 183665, 188720, 257131, 293864, 367330, 514262, 587728, 734660, 1028524, 1285655, 1469320, 2057048, 2571310, 2938640, 4114096, 5142620, 10285240, 20570480]

約数ペア:

[(1, 20570480), (2, 10285240), (4, 5142620), (5, 4114096), (7, 2938640), (8, 2571310), (10, 2057048), (14, 1469320), (16, 1285655), (20, 1028524), (28, 734660), (35, 587728), (40, 514262), (56, 367330), (70, 293864), (80, 257131), (109, 188720), (112, 183665), (140, 146932), (218, 94360), (280, 73466), (337, 61040), (436, 47180), (545, 37744), (560, 36733), (674, 30520), (763, 26960), (872, 23590), (1090, 18872), (1348, 15260), (1526, 13480), (1685, 12208), (1744, 11795), (2180, 9436), (2359, 8720), (2696, 7630), (3052, 6740), (3370, 6104), (3815, 5392), (4360, 4718)]