20917215

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42257}}^1$

素因数の和:42279

約数の個数: 24

約数和(自身を含む): 39553488

約数和(自身を除く): 18636273

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42257, 126771, 211285, 380313, 464827, 633855, 1394481, 1901565, 2324135, 4183443, 6972405, 20917215]

約数ペア:

[(1, 20917215), (3, 6972405), (5, 4183443), (9, 2324135), (11, 1901565), (15, 1394481), (33, 633855), (45, 464827), (55, 380313), (99, 211285), (165, 126771), (495, 42257)]