21380085

素因数分解:

$3^3\times 5^1\times {\mathrm{158371}}^1$

素因数の和:158385

約数の個数: 16

約数和(自身を含む): 38009280

約数和(自身を除く): 16629195

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 158371, 475113, 791855, 1425339, 2375565, 4276017, 7126695, 21380085]

約数ペア:

[(1, 21380085), (3, 7126695), (5, 4276017), (9, 2375565), (15, 1425339), (27, 791855), (45, 475113), (135, 158371)]