21379390

素因数分解:

$2^1\times 5^1\times {\mathrm{379}}^1\times {\mathrm{5641}}^1$

素因数の和:6027

約数の個数: 16

約数和(自身を含む): 38591280

約数和(自身を除く): 17211890

約数列:

[1, 2, 5, 10, 379, 758, 1895, 3790, 5641, 11282, 28205, 56410, 2137939, 4275878, 10689695, 21379390]

約数ペア:

[(1, 21379390), (2, 10689695), (5, 4275878), (10, 2137939), (379, 56410), (758, 28205), (1895, 11282), (3790, 5641)]