20900440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47501}}^1$

素因数の和:47523

約数の個数: 32

約数和(自身を含む): 51302160

約数和(自身を除く): 30401720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47501, 95002, 190004, 237505, 380008, 475010, 522511, 950020, 1045022, 1900040, 2090044, 2612555, 4180088, 5225110, 10450220, 20900440]

約数ペア:

[(1, 20900440), (2, 10450220), (4, 5225110), (5, 4180088), (8, 2612555), (10, 2090044), (11, 1900040), (20, 1045022), (22, 950020), (40, 522511), (44, 475010), (55, 380008), (88, 237505), (110, 190004), (220, 95002), (440, 47501)]