20790275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 31069440

約数和(自身を除く): 10279165

約数列:

[1, 5, 11, 19, 23, 25, 55, 95, 115, 173, 209, 253, 275, 437, 475, 575, 865, 1045, 1265, 1903, 2185, 3287, 3979, 4325, 4807, 5225, 6325, 9515, 10925, 16435, 19895, 24035, 36157, 43769, 47575, 75601, 82175, 99475, 120175, 180785, 218845, 378005, 831611, 903925, 1094225, 1890025, 4158055, 20790275]

約数ペア:

[(1, 20790275), (5, 4158055), (11, 1890025), (19, 1094225), (23, 903925), (25, 831611), (55, 378005), (95, 218845), (115, 180785), (173, 120175), (209, 99475), (253, 82175), (275, 75601), (437, 47575), (475, 43769), (575, 36157), (865, 24035), (1045, 19895), (1265, 16435), (1903, 10925), (2185, 9515), (3287, 6325), (3979, 5225), (4325, 4807)]