21538359

素因数分解:

$3^3\times {\mathrm{157}}^1\times {\mathrm{5081}}^1$

素因数の和:5247

約数の個数: 16

約数和(自身を含む): 32118240

約数和(自身を除く): 10579881

約数列:

[1, 3, 9, 27, 157, 471, 1413, 4239, 5081, 15243, 45729, 137187, 797717, 2393151, 7179453, 21538359]

約数ペア:

[(1, 21538359), (3, 7179453), (9, 2393151), (27, 797717), (157, 137187), (471, 45729), (1413, 15243), (4239, 5081)]