21330405

素因数分解:

$3^3\times 5^1\times {\mathrm{158003}}^1$

素因数の和:158017

約数の個数: 16

約数和(自身を含む): 37920960

約数和(自身を除く): 16590555

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 158003, 474009, 790015, 1422027, 2370045, 4266081, 7110135, 21330405]

約数ペア:

[(1, 21330405), (3, 7110135), (5, 4266081), (9, 2370045), (15, 1422027), (27, 790015), (45, 474009), (135, 158003)]