21386660

素因数分解:

$2^2\times 5^1\times {\mathrm{739}}^1\times {\mathrm{1447}}^1$

素因数の和:2195

約数の個数: 24

約数和(自身を含む): 45003840

約数和(自身を除く): 23617180

約数列:

[1, 2, 4, 5, 10, 20, 739, 1447, 1478, 2894, 2956, 3695, 5788, 7235, 7390, 14470, 14780, 28940, 1069333, 2138666, 4277332, 5346665, 10693330, 21386660]

約数ペア:

[(1, 21386660), (2, 10693330), (4, 5346665), (5, 4277332), (10, 2138666), (20, 1069333), (739, 28940), (1447, 14780), (1478, 14470), (2894, 7390), (2956, 7235), (3695, 5788)]