21399243

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{3203}}^1$

素因数の和:3354

約数の個数: 16

約数和(自身を含む): 30450816

約数和(自身を除く): 9051573

約数列:

[1, 3, 17, 51, 131, 393, 2227, 3203, 6681, 9609, 54451, 163353, 419593, 1258779, 7133081, 21399243]

約数ペア:

[(1, 21399243), (3, 7133081), (17, 1258779), (51, 419593), (131, 163353), (393, 54451), (2227, 9609), (3203, 6681)]