20718280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47087}}^1$

素因数の和:47109

約数の個数: 32

約数和(自身を含む): 50855040

約数和(自身を除く): 30136760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47087, 94174, 188348, 235435, 376696, 470870, 517957, 941740, 1035914, 1883480, 2071828, 2589785, 4143656, 5179570, 10359140, 20718280]

約数ペア:

[(1, 20718280), (2, 10359140), (4, 5179570), (5, 4143656), (8, 2589785), (10, 2071828), (11, 1883480), (20, 1035914), (22, 941740), (40, 517957), (44, 470870), (55, 376696), (88, 235435), (110, 188348), (220, 94174), (440, 47087)]