21757065

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131861}}^1$

素因数の和:131880

約数の個数: 16

約数和(自身を含む): 37976256

約数和(自身を除く): 16219191

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 131861, 395583, 659305, 1450471, 1977915, 4351413, 7252355, 21757065]

約数ペア:

[(1, 21757065), (3, 7252355), (5, 4351413), (11, 1977915), (15, 1450471), (33, 659305), (55, 395583), (165, 131861)]