21080865

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{108107}}^1$

素因数の和:108128

約数の個数: 16

約数和(自身を含む): 36324288

約数和(自身を除く): 15243423

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 108107, 324321, 540535, 1405391, 1621605, 4216173, 7026955, 21080865]

約数ペア:

[(1, 21080865), (3, 7026955), (5, 4216173), (13, 1621605), (15, 1405391), (39, 540535), (65, 324321), (195, 108107)]