81316784

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{181}}^1\times {\mathrm{653}}^1$

素因数の和:885

約数の個数: 40

約数和(自身を含む): 162354192

約数和(自身を除く): 81037408

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 181, 344, 362, 653, 688, 724, 1306, 1448, 2612, 2896, 5224, 7783, 10448, 15566, 28079, 31132, 56158, 62264, 112316, 118193, 124528, 224632, 236386, 449264, 472772, 945544, 1891088, 5082299, 10164598, 20329196, 40658392, 81316784]

約数ペア:

[(1, 81316784), (2, 40658392), (4, 20329196), (8, 10164598), (16, 5082299), (43, 1891088), (86, 945544), (172, 472772), (181, 449264), (344, 236386), (362, 224632), (653, 124528), (688, 118193), (724, 112316), (1306, 62264), (1448, 56158), (2612, 31132), (2896, 28079), (5224, 15566), (7783, 10448)]