21293439

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{853}}^1$

素因数の和:1066

約数の個数: 16

約数和(自身を含む): 29145312

約数和(自身を除く): 7851873

約数列:

[1, 3, 53, 157, 159, 471, 853, 2559, 8321, 24963, 45209, 133921, 135627, 401763, 7097813, 21293439]

約数ペア:

[(1, 21293439), (3, 7097813), (53, 401763), (157, 135627), (159, 133921), (471, 45209), (853, 24963), (2559, 8321)]