21883790

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{27701}}^1$

素因数の和:27787

約数の個数: 16

約数和(自身を含む): 39890880

約数和(自身を除く): 18007090

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 27701, 55402, 138505, 277010, 2188379, 4376758, 10941895, 21883790]

約数ペア:

[(1, 21883790), (2, 10941895), (5, 4376758), (10, 2188379), (79, 277010), (158, 138505), (395, 55402), (790, 27701)]