21420971

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{919}}^1$

素因数の和:1106

約数の個数: 16

約数和(自身を含む): 25347840

約数和(自身を除く): 3926869

約数列:

[1, 11, 13, 143, 163, 919, 1793, 2119, 10109, 11947, 23309, 131417, 149797, 1647767, 1947361, 21420971]

約数ペア:

[(1, 21420971), (11, 1947361), (13, 1647767), (143, 149797), (163, 131417), (919, 23309), (1793, 11947), (2119, 10109)]