20800240

素因数分解:

$2^4\times 5^1\times {\mathrm{260003}}^1$

素因数の和:260016

約数の個数: 20

約数和(自身を含む): 48360744

約数和(自身を除く): 27560504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260003, 520006, 1040012, 1300015, 2080024, 2600030, 4160048, 5200060, 10400120, 20800240]

約数ペア:

[(1, 20800240), (2, 10400120), (4, 5200060), (5, 4160048), (8, 2600030), (10, 2080024), (16, 1300015), (20, 1040012), (40, 520006), (80, 260003)]