21306857

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{4027}}^1$

素因数の和:4088

約数の個数: 16

約数和(自身を含む): 25714752

約数和(自身を除く): 4407895

約数列:

[1, 11, 13, 37, 143, 407, 481, 4027, 5291, 44297, 52351, 148999, 575861, 1638989, 1936987, 21306857]

約数ペア:

[(1, 21306857), (11, 1936987), (13, 1638989), (37, 575861), (143, 148999), (407, 52351), (481, 44297), (4027, 5291)]