21128085

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42683}}^1$

素因数の和:42705

約数の個数: 24

約数和(自身を含む): 39952224

約数和(自身を除く): 18824139

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42683, 128049, 213415, 384147, 469513, 640245, 1408539, 1920735, 2347565, 4225617, 7042695, 21128085]

約数ペア:

[(1, 21128085), (3, 7042695), (5, 4225617), (9, 2347565), (11, 1920735), (15, 1408539), (33, 640245), (45, 469513), (55, 384147), (99, 213415), (165, 128049), (495, 42683)]