21171315

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128311}}^1$

素因数の和:128330

約数の個数: 16

約数和(自身を含む): 36953856

約数和(自身を除く): 15782541

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128311, 384933, 641555, 1411421, 1924665, 4234263, 7057105, 21171315]

約数ペア:

[(1, 21171315), (3, 7057105), (5, 4234263), (11, 1924665), (15, 1411421), (33, 641555), (55, 384933), (165, 128311)]