28218515

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{313}}^1$

素因数の和:423

約数の個数: 32

約数和(自身を含む): 39036480

約数和(自身を除く): 10817965

約数列:

[1, 5, 13, 19, 65, 73, 95, 247, 313, 365, 949, 1235, 1387, 1565, 4069, 4745, 5947, 6935, 18031, 20345, 22849, 29735, 77311, 90155, 114245, 297037, 386555, 434131, 1485185, 2170655, 5643703, 28218515]

約数ペア:

[(1, 28218515), (5, 5643703), (13, 2170655), (19, 1485185), (65, 434131), (73, 386555), (95, 297037), (247, 114245), (313, 90155), (365, 77311), (949, 29735), (1235, 22849), (1387, 20345), (1565, 18031), (4069, 6935), (4745, 5947)]