19999972

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{1459}}^1$

素因数の和:1635

約数の個数: 24

約数和(自身を含む): 36792000

約数和(自身を除く): 16792028

約数列:

[1, 2, 4, 23, 46, 92, 149, 298, 596, 1459, 2918, 3427, 5836, 6854, 13708, 33557, 67114, 134228, 217391, 434782, 869564, 4999993, 9999986, 19999972]

約数ペア:

[(1, 19999972), (2, 9999986), (4, 4999993), (23, 869564), (46, 434782), (92, 217391), (149, 134228), (298, 67114), (596, 33557), (1459, 13708), (2918, 6854), (3427, 5836)]