21289390

素因数分解:

$2^1\times 5^1\times {\mathrm{419}}^1\times {\mathrm{5081}}^1$

素因数の和:5507

約数の個数: 16

約数和(自身を含む): 38419920

約数和(自身を除く): 17130530

約数列:

[1, 2, 5, 10, 419, 838, 2095, 4190, 5081, 10162, 25405, 50810, 2128939, 4257878, 10644695, 21289390]

約数ペア:

[(1, 21289390), (2, 10644695), (5, 4257878), (10, 2128939), (419, 50810), (838, 25405), (2095, 10162), (4190, 5081)]