21380865

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{129581}}^1$

素因数の和:129600

約数の個数: 16

約数和(自身を含む): 37319616

約数和(自身を除く): 15938751

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 129581, 388743, 647905, 1425391, 1943715, 4276173, 7126955, 21380865]

約数ペア:

[(1, 21380865), (3, 7126955), (5, 4276173), (11, 1943715), (15, 1425391), (33, 647905), (55, 388743), (165, 129581)]