21999952

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{105769}}^1$

素因数の和:105790

約数の個数: 20

約数和(自身を含む): 45904180

約数和(自身を除く): 23904228

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 105769, 211538, 423076, 846152, 1374997, 1692304, 2749994, 5499988, 10999976, 21999952]

約数ペア:

[(1, 21999952), (2, 10999976), (4, 5499988), (8, 2749994), (13, 1692304), (16, 1374997), (26, 846152), (52, 423076), (104, 211538), (208, 105769)]