638866796

素因数分解:

$2^2\times {\mathrm{139}}^1\times {\mathrm{643}}^1\times {\mathrm{1787}}^1$

素因数の和:2573

約数の個数: 24

約数和(自身を含む): 1128442560

約数和(自身を除く): 489575764

約数列:

[1, 2, 4, 139, 278, 556, 643, 1286, 1787, 2572, 3574, 7148, 89377, 178754, 248393, 357508, 496786, 993572, 1149041, 2298082, 4596164, 159716699, 319433398, 638866796]

約数ペア:

[(1, 638866796), (2, 319433398), (4, 159716699), (139, 4596164), (278, 2298082), (556, 1149041), (643, 993572), (1286, 496786), (1787, 357508), (2572, 248393), (3574, 178754), (7148, 89377)]