19958978

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{24763}}^1$

素因数の和:24809

約数の個数: 16

約数和(自身を含む): 33282816

約数和(自身を除く): 13323838

約数列:

[1, 2, 13, 26, 31, 62, 403, 806, 24763, 49526, 321919, 643838, 767653, 1535306, 9979489, 19958978]

約数ペア:

[(1, 19958978), (2, 9979489), (13, 1535306), (26, 767653), (31, 643838), (62, 321919), (403, 49526), (806, 24763)]