20980120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74929}}^1$

素因数の和:74947

約数の個数: 32

約数和(自身を含む): 53949600

約数和(自身を除く): 32969480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74929, 149858, 299716, 374645, 524503, 599432, 749290, 1049006, 1498580, 2098012, 2622515, 2997160, 4196024, 5245030, 10490060, 20980120]

約数ペア:

[(1, 20980120), (2, 10490060), (4, 5245030), (5, 4196024), (7, 2997160), (8, 2622515), (10, 2098012), (14, 1498580), (20, 1049006), (28, 749290), (35, 599432), (40, 524503), (56, 374645), (70, 299716), (140, 149858), (280, 74929)]