21782690

素因数分解:

$2^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{15671}}^1$

素因数の和:15817

約数の個数: 16

約数和(自身を含む): 39493440

約数和(自身を除く): 17710750

約数列:

[1, 2, 5, 10, 139, 278, 695, 1390, 15671, 31342, 78355, 156710, 2178269, 4356538, 10891345, 21782690]

約数ペア:

[(1, 21782690), (2, 10891345), (5, 4356538), (10, 2178269), (139, 156710), (278, 78355), (695, 31342), (1390, 15671)]