21996728

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{211507}}^1$

素因数の和:211526

約数の個数: 16

約数和(自身を含む): 44416680

約数和(自身を除く): 22419952

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 211507, 423014, 846028, 1692056, 2749591, 5499182, 10998364, 21996728]

約数ペア:

[(1, 21996728), (2, 10998364), (4, 5499182), (8, 2749591), (13, 1692056), (26, 846028), (52, 423014), (104, 211507)]