641485

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:228

約数の個数: 16

約数和(自身を含む): 846720

約数和(自身を除く): 205235

約数列:

[1, 5, 13, 65, 71, 139, 355, 695, 923, 1807, 4615, 9035, 9869, 49345, 128297, 641485]

約数ペア:

[(1, 641485), (5, 128297), (13, 49345), (65, 9869), (71, 9035), (139, 4615), (355, 1807), (695, 923)]