21016215

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42457}}^1$

素因数の和:42479

約数の個数: 24

約数和(自身を含む): 39740688

約数和(自身を除く): 18724473

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42457, 127371, 212285, 382113, 467027, 636855, 1401081, 1910565, 2335135, 4203243, 7005405, 21016215]

約数ペア:

[(1, 21016215), (3, 7005405), (5, 4203243), (9, 2335135), (11, 1910565), (15, 1401081), (33, 636855), (45, 467027), (55, 382113), (99, 212285), (165, 127371), (495, 42457)]