20889815

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{307}}^1\times {\mathrm{439}}^1$

素因数の和:782

約数の個数: 16

約数和(自身を含む): 26019840

約数和(自身を除く): 5130025

約数列:

[1, 5, 31, 155, 307, 439, 1535, 2195, 9517, 13609, 47585, 68045, 134773, 673865, 4177963, 20889815]

約数ペア:

[(1, 20889815), (5, 4177963), (31, 673865), (155, 134773), (307, 68045), (439, 47585), (1535, 13609), (2195, 9517)]