21890791

素因数分解:

${\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{641}}^1$

素因数の和:762

約数の個数: 16

約数和(自身を含む): 24591168

約数和(自身を除く): 2700377

約数列:

[1, 13, 37, 71, 481, 641, 923, 2627, 8333, 23717, 34151, 45511, 308321, 591643, 1683907, 21890791]

約数ペア:

[(1, 21890791), (13, 1683907), (37, 591643), (71, 308321), (481, 45511), (641, 34151), (923, 23717), (2627, 8333)]