21697665

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131501}}^1$

素因数の和:131520

約数の個数: 16

約数和(自身を含む): 37872576

約数和(自身を除く): 16174911

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 131501, 394503, 657505, 1446511, 1972515, 4339533, 7232555, 21697665]

約数ペア:

[(1, 21697665), (3, 7232555), (5, 4339533), (11, 1972515), (15, 1446511), (33, 657505), (55, 394503), (165, 131501)]