21608390

素因数分解:

$2^1\times 5^1\times {\mathrm{809}}^1\times {\mathrm{2671}}^1$

素因数の和:3487

約数の個数: 16

約数和(自身を含む): 38957760

約数和(自身を除く): 17349370

約数列:

[1, 2, 5, 10, 809, 1618, 2671, 4045, 5342, 8090, 13355, 26710, 2160839, 4321678, 10804195, 21608390]

約数ペア:

[(1, 21608390), (2, 10804195), (5, 4321678), (10, 2160839), (809, 26710), (1618, 13355), (2671, 8090), (4045, 5342)]