20979556

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{5107}}^1$

素因数の和:5203

約数の個数: 24

約数和(自身を含む): 40046720

約数和(自身を除く): 19067164

約数列:

[1, 2, 4, 13, 26, 52, 79, 158, 316, 1027, 2054, 4108, 5107, 10214, 20428, 66391, 132782, 265564, 403453, 806906, 1613812, 5244889, 10489778, 20979556]

約数ペア:

[(1, 20979556), (2, 10489778), (4, 5244889), (13, 1613812), (26, 806906), (52, 403453), (79, 265564), (158, 132782), (316, 66391), (1027, 20428), (2054, 10214), (4108, 5107)]