18987886

素因数分解:

$2^1\times {\mathrm{53}}^1\times {\mathrm{271}}^1\times {\mathrm{661}}^1$

素因数の和:987

約数の個数: 16

約数和(自身を含む): 29170368

約数和(自身を除く): 10182482

約数列:

[1, 2, 53, 106, 271, 542, 661, 1322, 14363, 28726, 35033, 70066, 179131, 358262, 9493943, 18987886]

約数ペア:

[(1, 18987886), (2, 9493943), (53, 358262), (106, 179131), (271, 70066), (542, 35033), (661, 28726), (1322, 14363)]