681808

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{991}}^1$

素因数の和:1042

約数の個数: 20

約数和(自身を含む): 1353088

約数和(自身を除く): 671280

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 991, 1982, 3964, 7928, 15856, 42613, 85226, 170452, 340904, 681808]

約数ペア:

[(1, 681808), (2, 340904), (4, 170452), (8, 85226), (16, 42613), (43, 15856), (86, 7928), (172, 3964), (344, 1982), (688, 991)]