21452528

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{31181}}^1$

素因数の和:31232

約数の個数: 20

約数和(自身を含む): 42532248

約数和(自身を除く): 21079720

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 31181, 62362, 124724, 249448, 498896, 1340783, 2681566, 5363132, 10726264, 21452528]

約数ペア:

[(1, 21452528), (2, 10726264), (4, 5363132), (8, 2681566), (16, 1340783), (43, 498896), (86, 249448), (172, 124724), (344, 62362), (688, 31181)]