20391085

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{79}}^1$

素因数の和:146

約数の個数: 48

約数和(自身を含む): 30723840

約数和(自身を除く): 10332755

約数列:

[1, 5, 11, 13, 19, 55, 65, 79, 95, 143, 209, 247, 361, 395, 715, 869, 1027, 1045, 1235, 1501, 1805, 2717, 3971, 4345, 4693, 5135, 7505, 11297, 13585, 16511, 19513, 19855, 23465, 28519, 51623, 56485, 82555, 97565, 142595, 214643, 258115, 313709, 370747, 1073215, 1568545, 1853735, 4078217, 20391085]

約数ペア:

[(1, 20391085), (5, 4078217), (11, 1853735), (13, 1568545), (19, 1073215), (55, 370747), (65, 313709), (79, 258115), (95, 214643), (143, 142595), (209, 97565), (247, 82555), (361, 56485), (395, 51623), (715, 28519), (869, 23465), (1027, 19855), (1045, 19513), (1235, 16511), (1501, 13585), (1805, 11297), (2717, 7505), (3971, 5135), (4345, 4693)]