21278127

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{5099}}^1$

素因数の和:5222

約数の個数: 16

約数和(自身を含む): 30844800

約数和(自身を除く): 9566673

約数列:

[1, 3, 13, 39, 107, 321, 1391, 4173, 5099, 15297, 66287, 198861, 545593, 1636779, 7092709, 21278127]

約数ペア:

[(1, 21278127), (3, 7092709), (13, 1636779), (39, 545593), (107, 198861), (321, 66287), (1391, 15297), (4173, 5099)]