21389752

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{86249}}^1$

素因数の和:86286

約数の個数: 16

約数和(自身を含む): 41400000

約数和(自身を除く): 20010248

約数列:

[1, 2, 4, 8, 31, 62, 124, 248, 86249, 172498, 344996, 689992, 2673719, 5347438, 10694876, 21389752]

約数ペア:

[(1, 21389752), (2, 10694876), (4, 5347438), (8, 2673719), (31, 689992), (62, 344996), (124, 172498), (248, 86249)]