21720398

素因数分解:

$2^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{50047}}^1$

素因数の和:50087

約数の個数: 16

約数和(自身を含む): 38436864

約数和(自身を除く): 16716466

約数列:

[1, 2, 7, 14, 31, 62, 217, 434, 50047, 100094, 350329, 700658, 1551457, 3102914, 10860199, 21720398]

約数ペア:

[(1, 21720398), (2, 10860199), (7, 3102914), (14, 1551457), (31, 700658), (62, 350329), (217, 100094), (434, 50047)]