21006315

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42437}}^1$

素因数の和:42459

約数の個数: 24

約数和(自身を含む): 39721968

約数和(自身を除く): 18715653

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42437, 127311, 212185, 381933, 466807, 636555, 1400421, 1909665, 2334035, 4201263, 7002105, 21006315]

約数ペア:

[(1, 21006315), (3, 7002105), (5, 4201263), (9, 2334035), (11, 1909665), (15, 1400421), (33, 636555), (45, 466807), (55, 381933), (99, 212185), (165, 127311), (495, 42437)]