21905689

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{677}}^1$

素因数の和:840

約数の個数: 16

約数和(自身を含む): 25058880

約数和(自身を除く): 3153191

約数列:

[1, 13, 19, 131, 247, 677, 1703, 2489, 8801, 12863, 32357, 88687, 167219, 1152931, 1685053, 21905689]

約数ペア:

[(1, 21905689), (13, 1685053), (19, 1152931), (131, 167219), (247, 88687), (677, 32357), (1703, 12863), (2489, 8801)]