20517055

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{449}}^1$

素因数の和:523

約数の個数: 32

約数和(自身を含む): 28728000

約数和(自身を除く): 8210945

約数列:

[1, 5, 13, 19, 37, 65, 95, 185, 247, 449, 481, 703, 1235, 2245, 2405, 3515, 5837, 8531, 9139, 16613, 29185, 42655, 45695, 83065, 110903, 215969, 315647, 554515, 1079845, 1578235, 4103411, 20517055]

約数ペア:

[(1, 20517055), (5, 4103411), (13, 1578235), (19, 1079845), (37, 554515), (65, 315647), (95, 215969), (185, 110903), (247, 83065), (449, 45695), (481, 42655), (703, 29185), (1235, 16613), (2245, 9139), (2405, 8531), (3515, 5837)]