18987059

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{727}}^1$

素因数の和:795

約数の個数: 24

約数和(自身を含む): 24399648

約数和(自身を除く): 5412589

約数列:

[1, 7, 13, 41, 49, 91, 287, 533, 637, 727, 2009, 3731, 5089, 9451, 26117, 29807, 35623, 66157, 208649, 387491, 463099, 1460543, 2712437, 18987059]

約数ペア:

[(1, 18987059), (7, 2712437), (13, 1460543), (41, 463099), (49, 387491), (91, 208649), (287, 66157), (533, 35623), (637, 29807), (727, 26117), (2009, 9451), (3731, 5089)]