20886415

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:148

約数の個数: 48

約数和(自身を含む): 30643200

約数和(自身を除く): 9756785

約数列:

[1, 5, 11, 19, 23, 55, 79, 95, 115, 121, 209, 253, 395, 437, 605, 869, 1045, 1265, 1501, 1817, 2185, 2299, 2783, 4345, 4807, 7505, 9085, 9559, 11495, 13915, 16511, 19987, 24035, 34523, 47795, 52877, 82555, 99935, 172615, 181621, 219857, 264385, 379753, 908105, 1099285, 1898765, 4177283, 20886415]

約数ペア:

[(1, 20886415), (5, 4177283), (11, 1898765), (19, 1099285), (23, 908105), (55, 379753), (79, 264385), (95, 219857), (115, 181621), (121, 172615), (209, 99935), (253, 82555), (395, 52877), (437, 47795), (605, 34523), (869, 24035), (1045, 19987), (1265, 16511), (1501, 13915), (1817, 11495), (2185, 9559), (2299, 9085), (2783, 7505), (4345, 4807)]